1st Chemistry Honors Flashcard

Front

What is the mass number?

Back

The total number of protons and neutrons in an atom.

Front

What is the size of a neutron?

Back

1 amu.

Front

What is the size of an electron?

Back

Electrons are considered point particles with no size.

Front

Where are electrons located?

Back

In the electron cloud around the nucleus.

Front

What are the 3 subatomic particles that compose atoms?

Back

Protons, Neutrons, and Electrons.

Front

What is an atom?

Back

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

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of a neutron?

Back

Neutral charge.

Front

What is the charge of an electron?

Back

Negative charge.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons.