H2O2 is a compound, and the concept of "valence electrons" applies to atoms but not to compounds. If the question is or should be intended to be, "How many valence electrons did the atoms in one formula unit of H2O2 have before they reacted to form the compound?", the answer is one from each hydrogen atoms and six from each oxygen atom, for a total of 14.
Zinc has two valence electrons.
Aluminum has 3 valence electrons.
3 valence electrons
Lead has 4 valence electrons.
One valence electrons
Indium has 3 valence electrons.
8 valence electrons- 1s22s2p63s2p6
Zinc has two valence electrons.
5 valence electrons.
Aluminum has 3 valence electrons.
Beryllium has two valence electrons.
3 valence electrons
There are 3 valence electrons in an atom of aluminium.
There are no valence electrons.
Lead has 4 valence electrons.
6 Valence Electrons
Valence electrons are placed in the outermost shell of electrons.