Atomic Structure Flashcard

Front

What is the definition of an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are the three main subatomic particles of an atom?

Back

Protons, neutrons, and electrons.

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of a neutron?

Back

Neutral (no charge).

Front

What is the charge of an electron?

Back

Negative charge.

Front

How is the atomic number of an element defined?

Back

The atomic number is defined as the number of protons in the nucleus of an atom.

Front

What does the mass number of an atom represent?

Back

The mass number represents the total number of protons and neutrons in the nucleus.

Front

How do you calculate the number of neutrons in an atom?

Back

Subtract the number of protons (atomic number) from the mass number.

Front

What determines the identity of an element?

Back

The number of protons in the nucleus.

Front

If an atom has 6 protons and 6 neutrons, what is its mass number?

Back

The mass number is 12 (6 protons + 6 neutrons).