Atoms, Elements, Periodic Table

Front

What does the atomic number tell us?

Back

The atomic number tells us the number of protons in an atom.

Front

Where is most of an atom's mass found?

Back

Most of an atom's mass is found in the nucleus.

Front

What is the smallest piece of an element called?

Back

The smallest piece of an element is called an atom.

Front

Do all elements occur naturally on Earth?

Back

No, not all elements occur naturally on Earth.

Front

What is a valence electron?

Back

A valence electron is an electron that is farthest from the nucleus.

Front

What is an atom made of?

Back

An atom is made of protons, neutrons, and electrons.

Front

What is the nucleus of an atom?

Back

The nucleus is the center of an atom, containing protons and neutrons.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.