Question

6. The electronic configuration of some elements is given below. With the help of such electronic configurations, answer the following questions: A = 1s², 2s², 2p6, 3s¹ B = 1s², 2s², 2p6, 3s², 3p6, 4s¹ D = 1s², 2s², 2p6, 3s², 3p5 C = 1s², 2s², 2p5 i. Write the valency, period number, group number and block of the elements given above. ii. Name the chemical compound and molecular formula formed between A with D and B with C. iii. Which element is more reactive between A or B? iv. Which element is more reactive, C or D?​

Answer 1

A: Valency = 2, Period number = 2, Group number = 8, Block = s
B: Valency = 1, Period number = 3, Group number = 8, Block = s
D: Valency = 3, Period number = 3, Group number = 7, Block = p
C: Valency = 3, Period number = 2, Group number = 5, Block = p

ii. A with D forms Sodium Oxygen compound with the molecular formula Na2O. B with C forms Oxygen Chloride compound with the molecular formula OCl2.

iii. B is more reactive than A.

iv. C is more reactive than D.