Atoms and the Periodic Table

Front

What is the Periodic Table?

Back

A chart that shows all the elements scientists have discovered/created.

Front

What is the Periodic Table of Elements?

Back

A chart that lists all known chemical elements organized by their atomic number, electron configuration, and recurring chemical properties.

Front

What is an atom?

Back

The basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

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 that do not have an electric charge.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

What is atomic mass?

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

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 a chemical element?

Back

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

Front

What is a molecule?

Back

A group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.