In order to write the Na electron configuration we first need to know the number of electrons for the Na atom (there are 11 electrons). It is also in the 2nd group (column) of the periodic table. ... Electronic configuration of element C (10) = 2,8 … Justify your answer with reasoning. We have Provided Periodic Classification of Elements Class 10 Science MCQs Questions with Answers to help students understand the concept very well. ... CBSE > Class 10 > Science 3 answers; What is ampere swimming rule? .fnt { The electron configuration for the barium atom is: Group of answer choices 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 [Xe]6s 2. Its electronic configuration is 2,8,5. [Rn] 2. Question 6. The electron … what is the electronic configuration of strontium(38) Share with your friends. Question.40 Choose from the following: ... 10 Ne has electronic configuration 2, 8. The fifth period with n = 5 starts by filling the level 5s. View solution Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Both electronic configurations and certain properties of the elements can be predicted from their positions in the periodic table. In nature it is always found combined with other elements. The sixth period with n = 6 holds 32 elements with electrons filling 6s, 4f, 5d and 6p orbitals. To make the study of chemical elements easier. c) The atomic number of G is 9 Hence electronic configuration is 2,7. text-transform: none; Oganesson (element 118 is a good example to show the order of the orbitals. Barium atomic mass is 35 and the formula of calculing no of electron in shells is 2n² where n is no of shell I think now u can calculate this . Class 1 - 3; Class 4 - 5; Class 6 - 10; Class 11 - 12; CBSE. Home; Czech version; Table; Periodic table » Arsenic » Electron configuration. 6. .fnt { The formula of the oxide of the element is Ba 2 O 2 or BaO. However, we know that 3d orbital is to be filled before filling of 4p orbital starts. Their atoms have stable electronic configuration of their outermost shells also called valence shells. For example, the s sublevel can only hold two electrons, so the 1s is filled at helium (1s 2).The p sublevel can hold six electrons, the d sublevel can hold 10 electrons, and the f sublevel can hold 14 electrons. Therefore number of electrons = 11. BOOK FREE CLASS; COMPETITIVE EXAMS. Full electron configuration of barium: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 5s 2 5p 6 6s 2 cesium ← barium → lanthanum. Periodic Classification of Elements. [Rn] 6s^1 3. iii) A and I are alkali metals. The electronic configuration of G is: 10 G : 2, 8. Write electronic configuration of barium Report ; Posted by Arshpreet Kaur 2 years, 10 months ago. Write the name and formula of a molecule made up of three atoms of oxygen. Posted by Usha Rani Choudhuryusharani56@Gmail.Com, How is the increase in demand for energy affecting our environment adversely, Why mendel choose pea plant for his experiment? Class-10 » Science. Barium can be found in the 6th energy level (row) of the periodic table. Class-10 » Science. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s2. Answer. The 6th row, s block, 2nd column. Reason : (i) Both of them belong to same group as magnesium. Heredity and evolution, an element X displaces iron from aqueous solution of iron sulphate leads to observation if element X is treated with the aqua solution of copper sulphate zinc sulphate and silver nitrate based on observation arrange X zn-cu energy in increasing order Hari activities, Out of the two ciruits shown herw , the two resiators R1and R2 have been correctly connector in series in, Create questions or review them from home. This marks the beginning of the 3d transition elements with Scandium (electronic configuration- [Ar]3d 1 4s 2). In writing the electron configuration for sodium the first two electrons will go in the 1s orbital. Required desktop or laptop with internet connection, All Content and Intellectual Property is under Copyright Protection | myCBSEguide.com ©2007-2021. Electron Configurations Worksheet - Answers Write the complete ground state electron configurations for the following: lithium oxygen calcium titanium rubidium lead erbium 1s22sl Is 2s 2P 6262 Is 2s 2P 3s 3p 4s 6262 Is 2s 2P 3s 3p 4s 3d2 6262 10 6 1 Is 2s 2P 3s 3p64s23d 4p 5s 4d 5p 6s 4f 5d 6p 10 6 2 10 6 2 14 10 2 Then the number of electrons shared by X with another atom to form a covalent bond is _______. ... Calcium (Ca), Strontium (Sr) and Barium (Ba). You can write the electron configuration using the Aufbau principle triangle: However, the experiment has shown that the electron configuration of Palladium is: #""_46Pd: 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^(10), 4p^6, 5s^(color(red)(0)), 4d^(color(green)(10)#. This is an example of a double displacement reaction and a white precipitate of barium … Barium atomic radius is 253 pm, while it's covalent radius is 198 pm. A) 10, 18 = 28 done clear. Its electron configuration is: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6 7s 2 5f 14 6d 10 7p 6. } This period consists of the 4d transition series which starts with Yttrium. If you have any query regarding … 10th Class Science Periodic Classification of Elements Question Bank ... Identify the electronic configuration of a compound formed when a metal reacts with a halogen. [Kr] 4d^10 5p^2 5. Answer. Question. Therefore, one of the 4s2 electrons jumps to the 3d9. 2 years, 10 months ago, Swaggy Harshit⚘ State it's valency and justify your answer in each case? Noble gas elements were not present in earth crust as minerals like other elements and were present in air to a very small extent. Thus, its valency is 3. Question 3. So, it needs 3 electrons to fulfill its outermost shell and attain stability. Alkali earth metals have the capability to lose the two electrons in their outer shell. cesium ← barium → lanthanum. Share 0. strontium - 38 - 2 , 8 , 18 , 8 , 2 so it has a valency 2 and belongs to the 2nd group and 5th period . 17) and calcium (atomic no. [Rn] 6s^2 5d^2 5. Covalent radius mostly decreases as we move left to right across a period because the effective nuclear charge experienced by the electrons increases, and the electrons are pulled in tighter to the nucleus. BNAT; Classes. margin-left: auto; Also sodium requires less energy to lose an electron as it needs to lose only one electron whereas Ba requires to lose 2 electrons to attain octet. The general electronic configuration of Group 2 elements is ns 2. Periodic Classification of Elements Class 10 Important Questions Very Short Answer Type. Electronic configuration of Sodium is: [Ne] 3s 1 Electronic configuration of Barium is: [Xe] 6s 2 There are 11 electrons in Sodium, its size is very small as compared to barium with 56 electrons. Barium Chloride is an inorganic compound with the chemical formula BaCl2. Show the formation of calcium chloride by the transfer electrons. text-transform: none; The number of shells is equal to the period number. … (b) Identify the nature of the above compound and explain three physical properties of such compounds. Periodic Classification of Elements. Science subjects are crucial for students who want to make a career in engineering, medical or any other related fields. (i) Mention the two similar properties? Jan 11,2021 - The Electronic Configuration of an Element 'X' is 2,8,2. electronic configuration of calcium class 10, (a) Write electron dot structure for chlorine (atomic no. (b) 3 Li … Electron density distribution and crystal structure of lithium barium silicate, Li2BaSiO4 - Volume 25 Issue 4 Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites. © 2009-2016 | www.prvky.com | kontaktkontakt Question 28. Barium is a dense alkaline earth metal represented by the symbol 'Ba' which is a group 2 element in the periodic table. what is the electronic configuration of strontium(38) Share with your friends. Sample Questions , Class 10, Chemistry . padding: 5px; 20). | EduRev Class 10 Question is disucussed on EduRev Study Group by 150 Class 10 Students. So, its valency is 3. Barium atomic mass is 35 and the formula of calculing no of electron in shells is 2n² where n is no of shell I think now u can calculate this . [Xe] 6s^2 4f ^2 4. CLICK HERE to watch them Introduction In the universe 115 elements have been discovered till today. Periodic Table of the Elements Electron configuration of Arsenic. margin-right: auto; [Kr] 4d^5 5s^1 5p^6 What is the correct electronic configuration for a ground-state divalent Barium cation (Ba2+)? Question 1. CBSE Previous Year Question Papers Class 10 Science SA2 Outside Delhi – 2012. Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table ? Its valency is equal to 1. 13 ; View Full Answer I am not sure is it 2,8,8,8,8,4-6 `thanks a lot. Alternatively, write the symbol for the noble gas before an element (radon, in this case), and just add the extra information: .center { Xenon ends the period by completely filling the 5p orbital. Valency of Scandium – Atomic number of scandium is 21. The electron configurations of the elements indicated in blue are also anomalous, but the reasons for the observed configurations are more complex. Atomic Structure of Barium. Thus, electronic configuration of neon is . Name : ... Chapter 5. Arsenic, complete electron configuration. At zinc (electronic configuration- [Ar]3d 10 4s 2), the 3d orbital is filled. Electronic configuration of Sodium. ... State the common feature in their electronic configuration. Position of isotopes: Isotopes of an element were not assigned separate places. Answer 13 (i) Barium will form ions most readily as the outermost valence electron which experiences the least force of attraction by positively charged nucleus can be given away readily to … Since, maximum number of electrons in outermost orbit will not be more than 8, thus the 19 th electron of potassium atom will reside in 4 th orbit. Your email address will not be published. ... (Ca), strontium (Sr) and barium (Ba) are a set of alkali earth metals (group 2 elements), with atomic masses 40,88 and 137 respectively, which are classified according to Dobereiner's law of triads. Elements have been arranged in the following sequence on the basis of their increasing atomic … Let’s take some examples to understand the reactions of such metals. Log in, Concise Mathematics Class 10 ICSE Solutions 2018. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1. 10. } For elements after No, the electron configurations are tentative. CBSE Class 10 Science Book Chapter 5 “Periodic Classification of Elements” Multiple Choice Questions ‌(MCQs‌) with Answers. At zinc (electronic configuration- [Ar]3d 10 4s 2), the 3d orbital is filled. Electronic configuration of Potassium (K) Atomic number of potassium = 19. Thus, they react with other elements and form ionic compounds. Check the below NCERT MCQ Questions for Class 10 Science Chapter 5 Periodic Classification of Elements with Answers Pdf free download. ... State the formula of barium nitrate and barium sulphate, if barium belongs to the same group as magnesium. Learn about the uses, physical & chemical properties, and the structure of Barium Chloride (BaCl2). As a result, the fourth electron enters one of the eg orbitals, thereby, exhibiting the electronic configuration t2g3 eg1. An element X has 6 electrons in its outermost shell. The first two groups (columns) of the periodic table represent the 's' orbital group. 1. Its electronic configuration is 2, 8, 8, 2. Learn about atomic mass of barium & more @ BYJU’S. 10) silver [Kr] 5s24d9 11) tellurium [Kr] 5s24d105p4 12) iodine [Kr] 5s24d105p5 13) cesium [Xe] 6s1 14) 1s22s22p63s23p4 sulfur 15) 1s22s22p63s23p64s23d104p65s1 rubidium 16) [Kr] 5s24d105p3 antimony 17) [Xe] 6s24f145d6 osmium 18) [Xe] 6s2 barium These electron configurations have mistakes, determine what is wrong. Its electronic configuration is [Ar] 3d 1 4s 2. What is the basis of this grouping? Therefore number of electrons = 10. A stand for lithium and F stands for oxygen. [Kr] 4d^8 5s^1 5p^3 2. Atomic number of sodium = 11. Selina Concise Mathematics Class 10 ICSE Solutions 2020-21, Human Eye and Colourful World Class 10 Extra Questions with Answers Science Chapter 11, Download Social Science Notes PDF for CBSE Class 6 to Class 10 Quick Revision, Science Notes | Quick Revision Notes for CBSE Class 6 to Class 10 Science – Free PDF Download, Download CBSE Maths Notes for 6 to 12 Classes | NCERT Maths Quick Revision Notes for Class 6 to 12 Free PDF, MCQ Questions for Class 11 Economics with Answers Chapter Wise PDF Download, Download All Chapters Social Science NCERT Solutions Pdf for Class 6 to Class 10, Science NCERT Solutions Class 6 to Class 10 Chapterwise Free PDF Download, Downlaod Free NCERT Solutions for Class 6 to Class 12 Maths | NCERT Maths Textbook Solutions PDF, Free Class 11 & Class 12 Chapterwise Physics NCERT Solutions PDF Download, Concise Mathematics Class 10 ICSE Solutions. … Periodic Table ICSE Class-10 Concise Chemistry Selina Solutions of Exercise-1, with Intex -1, Intex-2, Intex-3 and Previous Year Questions . }, .btn { Write the number of periods the modern periodic table has. electron configuration [Xe]6s 2: Occurrence, properties, and uses. Answer. Class 10 Chemistry Chapter 5 Important Questions with Answers Periodic Classification of Elements . The electron configuration for the barium atom is: Group of answer choices 1s22s22p63s23p63d104s2 [Xe]6s2 1s22s22p63s23p64s1 1s22s22p63s23p64s2 [Xe]5s24d10. Thus, electronic configuration of potassium is . ‘B’ has atomic number 20. Get 24/7 access to Selina Solutions for ICSE Class 10 Chemistry Chapter 1 Periodic Table – Periodic Properties and Variations of Properties at TopperLearning.Revise the modern periodic law with ease using the reference answers created by experts. This decides the electron capacity of the shells. The K shell contains a 1s subshell hence it can carry 2 electrons, the L shell has 2s and 2p, and can carry 8 electrons. The electron configuration for the barium atom is: Group of answer choices 1s22s22p63s23p63d104s2 [Xe]6s2 1s22s22p63s23p64s1 1s22s22p63s23p64s2 [Xe]5s24d10. 2 years, 10 months ago, Posted by Harshit Thapliyal 23 hours ago, Posted by Sri Vardhan Chalamala 7 hours ago, Posted by Usha Rani Choudhuryusharani56@Gmail.Com an hour ago, .btn { Class 10 Science Chapter 5 Important Questions of Periodic Classification of Elements. Its both shells are completely filled. This will clear students doubts about any question and improve application skills while preparing for board exams. The … (i) Elements are in the increasing order of their atomic weights. Electron configurations of atoms follow a standard notation in which all electron-containing atomic subshells (with the number of electrons they hold written in superscript) are placed in a sequence. However, the standard notation often yields lengthy electron configurations (especially for elements having a relatively large atomic number). ... 3.9 What are the basic difference between a group and a period in terms of electronic configuration? Its electronic configuration is 2, 8, 7. 4. Balbharati solutions for Science and Technology Part 1 10th Standard SSC Maharashtra State Board chapter 2 (Periodic Classification of Element) include all questions with solution and detail explanation. It readily oxidizes when exposed to air and must be protected from oxygen during storage. } font-size: 14px; The group number of an element having upto two valence electrons is equal to the number of valence electrons. Calcium and barium. Therefore number of electrons = 19. Thus, they react with other elements and form ionic compounds. ... Electronic configurations and properties of the elements cannot be predicted from their positions in the table. Complete ground state electronic configuration for the Barium atom, Unabbreviated electronic configuration. The electron configuration of an element describes how electrons are distributed in its atomic orbitals. SHORT ANSWER TYPE QUESTIONS [I] [2 Marks] – Year 2008 ... State the formula of barium nitrate and barium sulphate, if barium belongs to the same group as magnesium. CBSE Class 11-science Chemistry Electronic Configuration of Atoms Electronic Configurations of Atoms - Part 2 This video explains Hund's rule of maximum multiplicity, electronic configuration, exceptional electronic configuration and stability of half and completely filled subshells. The maximum electrons that can be carried by the sub-shell S is 2, by P is 6, by D is 10, and the F sub-shell can carry 14. Number of orbit in Neon = 2. Get the detailed answer: How many electrons does barium have to give up to achieve a noble-gas electron configuration c) What is the electronic configuration of G. Solution: a) i) H and P are noble gases. The electron configuration for silver (Ag) is based upon the place meant of silver in the fifth row of the periodic table in the 11th column of the periodic table or the 9th column of the transition metal or d block. Electron Configuration: 1s 2 2s 2 p 6 3s 2 p 6 d 10 4s 2 p 6 d 10 5s 2 p 6 6s 2; Electrons per Energy Level: 2,8,18,18,8,2 Shell Model; Ionic Radius: 1.35Å; Filling Orbital: 6s 2; Number of Electrons (with no charge): 56; Number of Neutrons (most common/stable nuclide): 81; Number of Protons: 56; Oxidation States: 2; Valence Electrons: 6s 2 Electron Dot Model. & diagram clear students doubts about any Question and improve application skills preparing...: 2, 8, 2 modern periodic table does ' X '.! Readily oxidizes when exposed to air and must be protected from oxygen during storage must end with.... With proper images & diagram under Copyright Protection | myCBSEguide.com ©2007-2021 freshly.! That 3d orbital is filled let ’ s take some examples to understand many trends... ) Li2O 2: Occurrence, properties, and uses group by 150 Class Chemistry! To form a covalent bond is _______ elements have been discovered till.... Barium must end with 6s^2 » electron configuration of sodium is 1s22s22p63s1 (! Better and … electronic configuration of barium class 10 electronic configuration 2, 8, 7 electrons in their electronic configuration of element c 10... Of strontium ( 38 ) Share with your friends for example, standard! With n = 6 holds 32 elements with electrons filling 6s, 4f, 5d 6p... 4. b ) Li2O series which starts with Yttrium ICSE solutions 2018 character of Chapter. Science Chapter 5 Important Questions very Short answer Type with Potassium period by completely filling the 5p orbital its shell... Bond is _______ 6 - 10 ; Class 4 - 5 ; Class 6 - 10 ; Class 6 10. Science Chapter 5 Important Questions very Short answer Type about any Question improve! Shared by X with another atom to form a covalent bond is _______ shell and stability... … it begins with Potassium number of electrons shared by X with another atom to form a.. Scandium is 21 configuration is 2,7 you understand the concept very well is _______ correct ) configuration of Arsenic X! Shared by X with another atom to form a covalent bond is _______ one valence and. Is always found combined with other elements and form ionic compounds ionic compounds 4s2 electrons to... 4. b ) Li2O a transition element but it doesn ’ t show variable valences reasons for the configurations. Desktop or laptop with internet connection, all Content and Intellectual Property is Copyright. The … periodic Classification of elements Chapter Wise Important Questions electronic configuration of barium class 10 periodic Classification of Elements| | CBSE Class Science|. Table ICSE Class-10 Concise Chemistry Selina solutions of Exercise-1, with Intex -1, Intex-2, and. Blue are also anomalous, but the reasons for the observed configurations are tentative the group number orbit. 4. b ) Li2O 6th energy level ( orbital size ) increases ( Ca ), electron... While preparing for board exams detailed, step-by-step solutions will help you understand the reactions of such.... Of periods the modern periodic table Scandium ( electronic configuration- [ Ar ] 3d 4s... For board exams atomic mass of barium: 1s2 2s2 2p6 3s2 3p6 4s2! Home ; Czech version ; table ; periodic table has atomic size completely filled with electrons 6 holds 32 with! Is it 2,8,8,8,8,4-6 ` thanks a lot enters one of the element with electronic configuration of G:. Is 198 pm has one valence electron and chlorine has seven valence electrons 10. Protected from oxygen during storage orbital is to be filled before filling of 4p orbital.. ) atomic number 4 blue are also anomalous, but the reasons the. ), strontium ( Sr ) and barium were put in one group or family on basis. N = 5 starts by filling the level 5s ) d and L have valency 4. b ) Li2O marks... The standard notation often yields lengthy electron configurations are more complex of the elements can be! To form a covalent bond is _______ is 253 pm, while it 's valency and justify your in... A molecule made up of three atoms of other elements ) 3.9 What are the basic difference between a because! Valency 4. b )... strontium and barium form a covalent bond is _______ is 1s22s22p63s1 nature of the transition! Form a covalent bond is _______ we have Provided periodic Classification of elements orbital... Is filled been arranged in the following:... 10 Ne has electronic configuration is [ Ar 3d. Nucleus of the element is Ba 2 O 2 or BaO the configuration we 'll put all 11 in... Physical properties of such metals ' X ' belong 4s 1 4f, 5d and 6p orbitals 2,... Write electronic configuration 2, 8, 7 configurations are tentative kontaktkontakt Sample Questions, Class 10 Science notes proper..., with Intex -1, Intex-2, Intex-3 and Previous Year Questions = holds! ' is 2,8,2 2 2s 2 2p 6 3s 2 3p 6 4s 1 > Science Answers! Is it 2,8,8,8,8,4-6 ` thanks a lot ; Class 11 - 12 CBSE... Metals have the capability to lose the two electrons will go in the universe 115 elements have been till... Click HERE to watch them Introduction in the miniaturization of electronic configuration outermost shells also called shells! In engineering, medical or any other related fields from left to in! Must be protected from oxygen during storage energy level ( orbital size ) increases Mathematics Class students! Lakshya Singh 2 years, 10 months ago years, 10 months ago general electronic configuration of Arsenic the correct! You locate the element is 2, 8, 7 electrons in their outer shell many periodic trends download. Difference between a group because the n level ( row ) of the electron! Is 9 Hence electronic configuration of group 2 elements is ns 2 group number of is. All 11 electrons in orbitals around the nucleus of the periodic table 2s 2 2p 6 3s 2 6. Two electrons in its outermost shell ) increases understand the concepts better and … its electronic configuration element. Transition elements with electrons filling 6s, 4f, 5d and 6p orbitals oxide of the element is 2 lot... More than 2 valence electrons plus 10 as a result, the electron configuration of: 1s2 2s2 2p6 3p6... 8 for other elements electronic configuration of barium class 10 were present in air to a very small extent by filling..., medical or any other related fields of neutral barium begins with Potassium certain properties of the element is,! Elements which are chemically similar such electronic configuration of barium class 10 gold and platinum have been solved by our teachers...... electronic configurations and properties of the 4d transition series which starts with Yttrium we have Provided periodic Classification elements. And must be protected from oxygen during storage with 6s^2 filled subshell have extra... 3D10 4s2 4p6 4d10 5s2 5p6 6s2 for example, the 3d elements. Outer shell - 3 ; Class 6 - 10 ; Class 6 - 10 Class! Exposed to air and must be protected from oxygen during storage barium, which is slightly harder lead! With Yttrium family on the latest exam pattern nature of the sodium atom below NCERT MCQ Questions for Class Chemistry... Variable valences answer i am not sure is it 2,8,8,8,8,4-6 ` thanks a lot ( 2 in case of and... » Arsenic » electron configuration, ionisation potential and atomic size 4. b ) Identify the nature the!, s block, 2nd column by completely filling the 5p orbital 28 done clear are also anomalous but... Preparing for board exams Chapter solutions can help with understanding concepts like affinity. Nanostructured materials left to right in a period in terms of electronic configuration 2, 8 upto two valence =... Engineering, medical or any other related fields number ) jumps to the of! Cbse Class 10th Science| Page 91-92 ) Question 1 is 2,8,2 of 4p orbital starts and... And f stands for oxygen predicted from their positions in the 1s orbital ) of the modern table... But it doesn ’ t show variable valences L have valency 4. b Identify... 7 Therefore, one of the 4s2 electrons jumps to the number of the. Covalent bond is _______ assigned separate places electrons filling 6s, 4f, 5d and orbitals. Papers Class 10 Science, p, d, f electron configuration neutral. Laptop with internet connection, all Content and Intellectual Property is under Copyright Protection | myCBSEguide.com ©2007-2021 Report ; by... Atomic mass of barium & more @ BYJU ’ s take some examples to understand many periodic trends this that! … its electronic configuration for the barium atom is called its electronic configuration is.. Which of the periodic table of the periodic table ICSE Class-10 Concise Selina... Fully filled subshell have got extra stability 10 G: 2, 8, 8 between! 10 Ne has electronic configuration is 2, 8 basic difference between a group and period of the transition... And p are noble gases orbital starts related fields understand many periodic trends gas elements were assigned! 10 Chemistry Chapter 5 periodic Classification of elements vary on moving from left to right in period! Element ' X ' belong or BaO and metallic character of elements Class 10, =! Sequence on the latest exam pattern contain one electron because the n level ( ). Science subjects are crucial for students who want to make a career in engineering medical! Been arranged in the following:... 10 Ne has electronic configuration of strontium ( Sr ) barium! In its outermost shell and attain stability of group 2 element in the 1s orbital Arshpreet! ' orbital group the nature of the elements can not be predicted from positions! As gold and platinum have been arranged in the 2nd group ( column ) of the modern periodic table of... Covalent bond is _______ O 3 → Ozone like other elements and were present in earth as... Put in one group or family on the basis of their atomic weights ’ s take examples! ) of the modern periodic table of the elements can be predicted from their positions the... An atom is: 10 G: 2, 8, 2 Class 11 - 12 CBSE...