Atoms and Subatomic Particles

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What are subatomic particles?

Back

Particles that make up an atom, including protons, neutrons, and 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 the atomic number?

Back

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

Front

What is the maximum number of electrons in the 1st energy level?

Back

2 electrons.

Front

What is the maximum number of electrons in the 2nd energy level?

Back

8 electrons.

Front

What is atomic mass?

Back

The average mass of all the isotopes of an element.

Front

What is an isotope?

Back

Atoms of the same element that have different numbers of neutrons.