Given an atom with the electron configuration of 1s22s22phow many valence electron does this atom have

The answer is letter c

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

It is a product

08.01 hope this and can i get brainlist? ?