Atomic Structure

Front

What is the atomic number?

Back

The number of protons 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 of an atom with 3 protons?

Back

3.

Front

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

Back

Protons and Neutrons.

Front

What is the mass number of an atom with 10 protons, 15 neutrons, and 10 electrons?

Back

25.

Front

Define protons.

Back

Positively charged subatomic particles found in the nucleus of an atom.

Front

Define neutrons.

Back

Neutral subatomic particles found in the nucleus of an atom.

Front

Define electrons.

Back

Negatively charged subatomic particles that orbit the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

How do you calculate the atomic mass of an element?

Back

By averaging the mass numbers of all its isotopes.