Covalent compound CH4 is composed of nonmetal elements, while KCl and NaBr are ionic compounds due to the metal-nonmetal combination.
In the given compounds, methane (CH4) is primarily covalent because it is composed of nonmetal elements, carbon, and hydrogen. Covalent compounds are typically formed by bonding nonmetal elements together. On the other hand, compounds like potassium chloride (KCl) and sodium bromide (NaBr) contain a metal (potassium, sodium) and a nonmetal (chlorine, bromine), making them ionic compounds due to the metal-nonmetal combination.
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