Composition of Matter

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

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, with no charge.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

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.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus of an atom.

Front

How do you determine the number of protons in an atom?

Back

The number of protons is equal to the atomic number of the element.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms.