Unit 1: Matter & Its Interactions (Chemistry)

the basic building block for all matter

• atom
• compound
• molecule
• salt

A chemical substance formed when two or more different elements bond in a specific proportion

• molecule
• atom
• compound
• element

a substance consisting of a single type of atom

• molecule
• compound
• salt
• element

multiple elements and/or compounds physically not chemically joined

• molecule
• mixture
• compound
• element

-Formed when two or more atoms bond together chemically
-The atoms can be the same or different

• Molecule
• Atom
• Chemical Equation
• Chemical Reaction

examples of compounds: 

• H
• O₃
• NH₃
• O₂

How many atoms are in CaCO3?

• 3
• 4
• 5
• 6

How many elements are in CaCO3?

• 3
• 4
• 5
• 6

How many elements are in H₂SO₄?

• 1
• 3
• 5
• 7

How many atoms are in H₂SO₄?

• 1
• 3
• 5
• 7