Atomic Theory

Unit 2:

Atomic Theory and

Nuclear Chemistry

Le​sson 4 - Atomic Theory and PEN Numbers

Open Ended

What are the parts of an atom?

Multiple Choice

Which subatomic particle has a negative charge?

• neutron

• electron

• proton

• nucleus

Multiple Choice

What was the mass of an electron?

• 1 amu

• too small to matter

• 2 amu

• $$1.672\times10^{-24}$$  grams

Multiple Select

What subatomic particles are added to find the atomic mass of an atom?

• protons

• electrons

• neutrons

• nucleus

Multiple Choice

If an element contains 13 protons and 12 electrons what would be its overall charge?

• +1

• -1

• +13

• -13

Multiple Choice

How many protons does a sulfur atom contain?

• 32

• 16

• 8

• 64

0

1

1

Multiple Choice

How many neutrons does an oxygen atom have?

• 8

• 16

• 24

• 0

Multiple Choice

How many electrons must an Iron atom have since there is no charge?

• 56

• 26

• 30

• 13

​26

​26

30

Multiple Choice

How many neutrons does this Iron-60 atom have?

• 26

• 34

• 60

• 30

Multiple Choice

How many electrons does this oxygen ion have since it has a -2 charge?

• 10

• 8

• 6

• 2