2-1 Flashcardizz Part 4 Mass of Atoms

Front

What is the MASS NUMBER of an atom?

Back

The MASS NUMBER is the total number of protons and neutrons in the nucleus of an atom.

Front

Which subatomic particle does not significantly contribute to the mass of an atom?

Back

Electrons are so tiny that they don't count toward the mass of an atom.

Front

What particles are found in the nucleus of an atom?

Back

The nucleus of an atom contains protons and neutrons.

Front

Is the atomic number the same as the MASS NUMBER?

Back

False, the atomic number is the number of protons, while the mass number is the sum of protons and neutrons.

Front

How do you determine the MASS of an atom?

Back

You add the number of protons (p+) and neutrons (n0) together.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is the significance of the atomic number?

Back

The atomic number determines the identity of an element and the number of protons in the nucleus.