The electronic configuration of four elements A,B,C and D,is given as follows: A- 2,8. B – 2,8,1. C – 2,8,2. D – 2,8,8. (a)Which of them belong to the same period? Name the period. (b)Which of them belong to the same group? Name the group. (c) Which amongst them would form (i) monovalent cation (ii) divalent cation.
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Answer:
A,B and C belong to same group
Verified answer
a) B, C and D belongs to same period since it has 3 shells. It is in 3rd periodb) A and D belongs to same group and it in in 18th group
c) i) B is monovalent cation
And ii) C is divalent cation