atoms, molecules & compounds

Front

What is an atom?

Back

The smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a compound?

Back

A substance formed when two or more different elements are chemically bonded together.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom, having no charge.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

How many atoms are in a molecule of water (H2O)?

Back

3 atoms (2 hydrogen and 1 oxygen).

Front

What is the chemical formula for carbon dioxide?

Back

CO2, which consists of 1 carbon atom and 2 oxygen atoms.

Front

What is the difference between an atom and a molecule?

Back

An atom is a single unit of an element, while a molecule is a group of two or more atoms bonded together.