Atomic History and Structure Review

Subatomic particles with a positive charge

• neutrons

• atomic mass

• protons

• isotopes

Subatomic particles that are neutral in charge

• Neutrons

• Protons

• Nucleus 

• Electrons

This is how you find the number of neutrons in an atom. 

• Subtract the atomic number from the atomic mass

• Subtract the atomic mass from the atomic number 

• Add the atomic mass to the atomic number 

• Divide the atomic mass by the atomic number 

How many protons does indium have?

• 49

• 66

• 114

• 115

Tags

NGSS.MS-PS1-1

What is the atomic mass of barium

• 56

• 82

• 137

• 138

If an atom has 3 electrons, how many protons does it have?

• 1

• 2

• 4

• 3

Tags

NGSS.MS-PS1-1

What is the mass number?

• the number of protons

• the number of protons and neutrons

• the number of neutrons

• the number of protons and electrons

What is the atomic number?

• the number of protons

• the number of protons and neutrons

• the number of neutrons

• the number of protons and electrons

Which is an electron?

• A

• B

• C

Tags

NGSS.MS-PS1-1

The atomic number of manganese (Mn) is 25; its mass number is 55. How many neutrons does an atom of manganese have in its nucleus?
TIP: APEMAN

• 25

• 80

• 30

• 55

Tags

NGSS.MS-PS1-1