There are O-H bonds in H2O. They have the intramolecular force of polar covalent bond.
Tabulations of chemical elements differing in their organization from the traditional seen periodic system
Noble Gas. Metals have 1 or 2 Valence Electrons. Halogens have 7 Valence Electrons. Semi-Metals can have different amounts.
Answer:
2H2+O2->2H2O
Explanation:
You have to balance the equation, you have 4 hydrogen and 2 oxygen atoms