Atom & Isotope Review

Front

What is an atom?

Back

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

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons, and accounting for most of the atom's mass.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom, contributing to its mass.

Front

What are electrons?

Back

Negatively charged particles that orbit 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 is the mass number?

Back

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

Front

What is an isotope?

Back

An atom with the same number of protons but different numbers of neutrons.

Front

How do you calculate the mass number of an isotope?

Back

Add the number of protons and neutrons together.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.