Question

find the valency if atomic number is 7 and mass number is 14​

Answer 1

Answer:

outermost shell 2and 5,,, then valency is 5

Answer 2

Explanation:

atomic number 7=2,5 electronic configuration

so valence electrons are greater than 4 so 8-valence electrons so answer would be 8-5 =3

answer is 3