Atoms, Ions, Isotopes

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of protons, neutrons, and electrons.

Front

What is a proton?

Back

A proton is a positively charged particle found in the nucleus of an atom. It determines the atomic number of an element.

Front

What is a neutron?

Back

A neutron is a neutral particle found in the nucleus of an atom. It contributes to the mass of the atom but does not affect its charge.

Front

What is an electron?

Back

An electron is a negatively charged particle that orbits the nucleus of an atom. It plays a key role in chemical bonding.

Front

What is the charge of a proton?

Back

+1

Front

What is the charge of an electron?

Back

-1

Front

What is the charge of a neutron?

Back

0 (neutral)

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.

Front

What are isotopes?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is mass number?

Back

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