How many valence electrons do h2o have?

Answer 1

8. Hydrogen has 1 valence electron, Oxygen has 6. Since H2O has two hydrogen atoms, Water has 6 + 1(2) = 8 valence electrons.

Answer 2

O contributes 6e- and H contributes 1e- each:

6+ 1(2)= 8 valence e-

Answer 3

8

Answer 4

8 :)