Terms to Learn #4 ATOMS

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

Back

nucleus

Front

What is the negatively charged particle that orbits the nucleus of an atom called?

Back

electron

Front

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

Back

atom

Front

What is the number in each box of the periodic table that represents (tells) the number of protons in the nucleus of each atom called?

Back

Atomic Number

Front

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

Back

Protons, Neutrons, Electrons

Front

What is the charge of a proton?

Back

Positive charge

Front

What is the charge of a neutron?

Back

No charge (neutral)

Front

What is the charge of an electron?

Back

Negative charge

Front

What is an element?

Back

A pure substance made of only one type of atom.