11.21.2024 OSE Atomic Structure Flashcard

Front

Where is most of the mass in an atom located?

Back

In the nucleus.

Front

What must an atom have to be considered neutral if it has 12 positively charged subatomic particles?

Back

12 electrons.

Front

What is the atomic number?

Back

The number of protons in the nucleus.

Front

What is the mass number?

Back

The number of protons and neutrons in the nucleus.

Front

Which subatomic particles contribute the most to the mass of an atom?

Back

Protons and Neutrons.

Front

What are protons?

Back

Positively charged subatomic particles found in the nucleus.

Front

What are neutrons?

Back

Neutral subatomic particles found in the nucleus.

Front

What are electrons?

Back

Negatively charged subatomic particles that orbit the nucleus.

Front

How do you calculate the mass number of an atom?

Back

Add the number of protons and neutrons.

Front

What is the charge of a neutron?

Back

Neutral (no charge).