Question

give reasons :-
(a) Element A is a metal
(b) Element B has larger atomic size than element C
(c) Element C has a valency of 1​

Answer 1

Answer-

a. Sodium

b. calcium

c. technetium

Answer 2

Answer:

A has only 1 electron in valence shell..... so it's a metal

B has a shell more than C, so it is larger

C has 7 valence electron and one electron is required to complete octet...... so valency 1

I hope that I could help...... pls mark as brainliest