Question

which of the following molecules is not formed by covalent bonding 1 point ch4 h2o nacl o2

Explanation:

To determine which molecule is not formed by covalent bonding, we analyze each option:

• \( \text{CH}_4 \) (methane): Carbon and hydrogen are non - metals. They share electrons, so \( \text{CH}_4 \) is formed by covalent bonding.
• \( \text{H}_2\text{O} \) (water): Hydrogen and oxygen are non - metals. They share electrons, so \( \text{H}_2\text{O} \) is formed by covalent bonding.
• \( \text{NaCl} \) (sodium chloride): Sodium is a metal and chlorine is a non - metal. Sodium donates an electron to chlorine, forming an ionic bond. So \( \text{NaCl} \) is not formed by covalent bonding.
• \( \text{O}_2 \) (oxygen gas): Two oxygen atoms (non - metals) share electrons, so \( \text{O}_2 \) is formed by covalent bonding.

Answer:

C. \( \text{NaCl} \)