Protons, Neutrons, Electrons Introduction

Front

What is the charge of a proton?

Back

Positive charge (+1)

Front

What is the charge of a neutron?

Back

No charge (neutral)

Front

What is the charge of an electron?

Back

Negative charge (-1)

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

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

Back

Mass number - Atomic number = Number of neutrons.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and reactions.

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

It is the weighted average mass of an element's isotopes.

Front

How many protons are in a Gold atom?

Back

79 protons.