Question

a)Write the electron dot structure of two elements A and B whose atomic numbers are 20 and
5
17 respectively. Identify the element and write the molecular formula of the compound formed when element A reacts with element B. State the nature of this compound. Give reasons to justify your answer

Answer 1

Answer:

Electronic configuration of X = 2,8,8,2

Electronic configuration of Y = 2,8,7

Molecular formula :

X has two extra electrons hence X has +2 valency Y needs 1 electron to be stable hence Y has -1 valency.

Type of bond - Ionic Bond