Question

Classify each of the following pure substances as an element or a compound:

A) Element: H2, Compound: CO2
​B) Element: Na, Compound: H2O
C) Element: O2, Compound: Fe2O3
​D) Element: N2, Compound: CH4

Answer 1

Elements and compounds are both examples of pure substances. An element is a substance that cannot be broken down into chemically simpler components, while a compound is a pure substance made up of two or more elements chemically combined.

Step-by-step explanation:

Elements and compounds are both examples of pure substances. An element is a substance that cannot be broken down into chemically simpler components. Examples of elements include hydrogen (H2), sodium (Na), oxygen (O2), and nitrogen (N2). A compound is a pure substance that is made up of two or more elements chemically combined in a fixed ratio. Examples of compounds include carbon dioxide (CO2), water (H2O), and methane (CH4).