Question

Basic form of matter that cannot be broken down into simpler substances by chemical reactions is called:

• A. Compound
• B. Element
• C. Pure substance
• D. Mixture

Answer 1

The correct option is B

Element

An element is a substance that cannot be broken down into simpler components by any non-nuclear chemical reaction. An element is uniquely determined by the number of protons in the nuclei of its atoms.

While the compounds, mixtures and pure substances are formed from different elements which can be broken down.