The physical stuff that makes up the universe

• Matter

• Atoms

• Elements

• Energy

The basic building blocks of matter

• Matter

• Atoms

• Elements

• Energy

Pure substances made of only one kind of atom

• Matter

• Atoms

• Elements

• Energy

Immaterial stuff that gets things done

• Matter

• Atoms

• Elements

• Energy

What is the number of neutrons?

• 22

• 12

• 18

• 40

What is the amount of protons and electrons?

• 7

• 3

• 4

• 6

What is the atomic weight?

• 209

• 210

• 125

• 84

What is the amount of neutrons?

• 41

• 34

• 75

• 109

Freezing of water

• 0°C

• -273°C

• 21°C

• 30°C

Absolute zero

• 0°C

• -273°C

• 21°C

• 30°C