Atoms and Molecules

Front

What is the Periodic Table of Elements?

Back

A chart that organizes all known chemical elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is the nucleus of an atom?

Back

The central part of an atom where protons and neutrons are located.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a proton?

Back

A subatomic particle of an atom that has a positive charge.

Front

How small are atoms compared to the width of a hair?

Back

Atoms are more than 10,000 times smaller than the width of a hair.

Front

What is an electron?

Back

A subatomic particle of an atom that has a negative charge.

Front

What is a neutron?

Back

A subatomic particle of an atom that has no charge (neutral).

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is an element?

Back

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

Front

What is a compound?

Back

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