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Which compound has covalent bonds?

August 2019 NY Regents Chemistry Exam

36 Which compound has covalent bonds? (1) H2O

(2) Li2O

(3) Na2O

(4) K2O

Solution: Covalent bonds are formed between two nonmetals. Nonmetals can be found on the right side of the staircase on the Periodic Table. Hydrogen is a nonmetal as well.

Li, Na, and K are all metals and will form ionic bonds with oxygen.

Answer: 1

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