Question

How to find group and period from electronic configuration

Answer 1

Answer:

1) First take the Atomic number of the given element. ...

2) Then calculate the electronic configuration using the atomic number 2+8+7=17 therefore the electronic configuration will be 2, 8, 7.

3) Here we find that the no of valence electrons of element is 7 as the valence shell has 7 electrons.