Question

the number of electrons in the Valence shell of an atom represents it's?​

Answer 1

Answer:

represent its group For example, atoms in Groups 1 and 2 have 1 and 2 valence electrons, respectively.

Answer 2

the number of electrons in the Valence shell of an atom represent it's Valence electron

Explanation:

for example if we take oxygen,the electronic configuration will be (2,8,6) so it's last shell is incomplete (to be a noble gas oxygen needs more electron) in this case the we come know how much electron we need , with the help of Valence electron