Question

the atomic no. of two elements A and B are 17 and 20 respectively. the formula of ionic compound made bu Aand B is​

Answer 1

Answer:

17 is chlorine Cl- and 20 is Ca+2

Explanation:

chlorine is nonmetal so to get stability they gain electrons.

calcium is metal to get stability it loose electrons.

Elements are following octet rule to get stability elements gains or looses or shared electrons for octet rule.