Atomic Structure

Front

What is the atomic structure of an atom?

Back

An atom consists of a nucleus containing protons and neutrons, surrounded by electrons in orbitals.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What is the charge of an electron?

Back

Negative.

Front

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Number of protons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in 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 the nucleus.

Front

How many protons does a lithium atom have?

Back

3 protons.

Front

How many electrons does a neutral atom have?

Back

A neutral atom has the same number of electrons as protons.

Front

What is an isotope?

Back

Isotopes are atoms of the same element with different numbers of neutrons.