Terms to Learn #4 ATOMS

Front

What is the positively charged particle that is in the nucleus of an atom called?

Back

Proton

Front

What is the smallest unit of matter; made of electrons, neutrons, and protons?

Back

Atom

Front

What is the chart that organizes all known elements by their physical and chemical properties called?

Back

Periodic Table of Elements

Front

What is a pure substance made of only one kind of atom called?

Back

Element

Front

What is the center of the atom that contains protons and neutrons and has a positive charge called?

Back

Nucleus

Front

What are the three main subatomic particles that make up an atom?

Back

Protons, Neutrons, Electrons

Front

What is the charge of a neutron?

Back

Neutral (no charge)

Front

What is the charge of an electron?

Back

Negative charge

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom of that element.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.