Types of Matter
Anything that has mass and takes up space.
What is matter?
A pure substance made of only one kind of atom.
What is an element?
What is the smallest unit of an element?
Atom
Two or more substances physically combined.
What is a mixture?
Is aluminum foil an element, compound, or mixture?
Element
What are the two main categories of matter?
Pure substances and mixtures
A substance made of two or more elements chemically combined.
What is a compound?
What is the smallest unit of a compound?
Molecule
Homogeneous is the same throughout; heterogeneous is not.
What’s the difference between a homogeneous and a heterogeneous mixture?
Is pizza a pure substance or a mixture?
Mixture (heterogeneous)
What is a pure substance?
Matter with a fixed composition; either an element or a compound.
True or False: Water is an element.
False—it’s a compound (H₂O).
True or False: Molecules are made of atoms.
True
Heterogeneous
Is a salad a homogeneous or heterogeneous mixture?
Is carbon dioxide (CO₂) an element or a compound?
Compound
Is saltwater a pure substance or a mixture?
Mixture
Air contains oxygen, nitrogen, carbon dioxide, and water vapor. Is it an element, compound, or mixture?
Mixture
The elements in a compound and how many atoms of each.
What does a chemical formula show?
Homogeneous
Is saltwater a homogeneous or heterogeneous mixture?
Is Kool-Aid a homogeneous or heterogeneous mixture?
Homogeneous
What’s the difference between a pure substance and a mixture?
Pure substances have only one kind of particle; mixtures have two or more substances physically combined.
Salt (NaCl) is made from sodium and chlorine bonded together. What type of matter is this?
What is a compound?
What’s the difference between an atom and a molecule?
An atom is one particle of an element; a molecule is two or more atoms bonded together.
Why are mixtures not considered pure substances?
The substances in a mixture are not chemically bonded and can be separated.
Is blood an element, compound, or mixture?
Mixture (mostly heterogeneous)