There are 118 different kinds of Elements on the Periodic Table.
Different Combinations of these 118 elements make up all of the materials we have on earth.

● Atoms are made of SUBATOMIC PARTICLES.

Electrons are in the electron cloud.

Protons and
Neutrons are in the Nucleus.

Remember the reasons we used the Colors.

You have to know the LOCATION, SIZE, and CHARGE of all three subatomic particles.

NEUTRON:

Location: Inside the Nucleus
Size: 1 amu (atomic mass unit)
Charge: Neutral–no charge (0)

PROTON:

Location: Inside the Nucleus
Size: 1 amu (atomic mass unit)
Charge: Positive (+)

ELECTRON:

Location: Electron Cloud–orbiting nucleus
Size: 1/1,836 amu (atomic mass unit)
Charge: Negative (-)

​Subtract the Atomic Number from the Rounded Atomic Mass.

​Round the Atomic Mass (decimal number) to the nearest whole number.

How do you know how to find the neutrons in an atom?