29 if an atom has atomic number 20 and mass number 40. the number of – InterviewSolution

1.	29 if an atom has atomic number 20 and mass number 40. the number of valence electron itpossesses is(1 Point)
Answer» tion:ATOMIC no is 20No of ELECTRONS =20K L M N2 8 8 2Therefore VALENCE shell has 2 electrons

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