Atoms

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom that contribute to the atomic mass.

Front

What is the mass number?

Back

The total number of protons and neutrons in an atom's nucleus.

Front

What are isotopes?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

How do you calculate the mass number?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the charge of an electron?

Back

Electrons have 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 mass?

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).