Chemistry Review!

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

• It's the same as the atomic #

• It's the same as the mass number

• Subtract the atomic # from the mass number

• Add the mass number and the atomic #

How many neutrons does beryllium have?

• 4

• 5

• 9

• 13

What is the atomic number of silicon?

• 14

• 28

• 42

• 7

Tags

NGSS.HS-PS1-1

How many neutrons are in magnesium?

• 12

• 24

• 25

• 36

Tags

NGSS.HS-PS1-8

How many electrons does oxygen have?

• 8

• 16

• 2

• 15

Tags

NGSS.HS-PS1-1

An electron has what charge?

• Positive

• Negative

• It has no charge (it is neutral)

A proton has what charge?

• Positive

• Negative

• It has no charge (it is neutral)

A proton has what charge?

• Positive

• Negative

• It has no charge (it is neutral)

A neutron has what charge?

• Positive

• Negative

• It has no charge (it is neutral)

What is the charge on a lithium atom that looses 1 electron?

• +1
• 0
• -1
• -2