Atoms

Front

What is an atom?

Back

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

Front

What is the atomic number of an element?

Back

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

Front

True or False: Two atoms of DIFFERENT elements can have the same atomic number.

Back

False

Front

How are elements distinguished from one another?

Back

Elements are distinguished by the number of protons in their nuclei.

Front

What are isotopes?

Back

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

Front

What subatomic particles have a neutral charge?

Back

Neutrons are the subatomic particles that have a neutral charge.

Front

What happens when electrons are removed from a neutral atom?

Back

Removing electrons from a neutral atom will make the atom positively charged.

Front

What is a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom.

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle that orbits the nucleus of an atom.

Front

What is the mass number of an atom?

Back

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