Front

What is the mass number defined as?

Back

The mass number is the number of protons plus neutrons.

Front

Why do most atoms have no net charge?

Back

Most atoms have no net charge because they have an equal number of electrons and protons.

Front

What is the atomic number?

Back

The atomic number is the number of protons in an atom.

Front

What do isotopes have different of?

Back

Isotopes have different mass numbers.

Front

What does K+ indicate about the ion?

Back

K+ indicates that the ion has lost one electron.

Front

What particles are found in the nucleus of an atom?

Back

The nucleus of an atom contains protons and neutrons.

Front

What is the charge of a proton?

Back

The charge of a proton is positive.

Front

What is the charge of a neutron?

Back

The charge of a neutron is neutral (no charge).

Front

What is the charge of an electron?

Back

The charge of an electron is negative.

Front

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

Back

The number of neutrons can be calculated by subtracting the atomic number from the mass number.