Question

What are valence electrons ? please !

Answer 1

The electrons in the outermost shell of an atom are known as valence electrons .
EG Nitrogen= 14 = 2,8,4 therefore it has 4 valence electrons .
      They also help in determining the valency .
       Hope this helps .

Answer 2

The electrons which are present in the outer most shell of an atom are known as valence electrons.