Question 1

What is the difference between an element and a compound?

Accepted Answer

An element only consists of a single type of atom ()

A compound consists of multiple types of atoms, linked by covalent or ionic bonds ()

Question 2

What are pure substances?

Accepted Answer

Something that only has a single type of matter

(can be an element or a compound; , , )

Question 3

What are mixtures?

Accepted Answer

Multiple pure substances mixed together

(bonding doesn't occur!)

Question 4

What is the difference between homogenous and heterogeneous mixtures?

Accepted Answer

Homogenous mixtures have a uniform appearance because they are closely mixed (chocolate milk)

Heterogeneous mixtures are not evenly distributed and have multiple components (cereal)

Question 5

What are diatomic elements?

Accepted Answer

Pure elements that form molecules of two bonded atoms

(, , ; Have No Fear Of Ice Cold Beer)

Question 6

What is chromatography?

Accepted Answer

A method for separating solutions through a medium where components move at different rates

Question 7

What is distillation?

Accepted Answer

A method for separating mixtures that are made of liquids

Heats the mixture, which vaporizes the most volatile liquid first, then recondenses it later

Question 8

What is evaporation?

Accepted Answer

A technique to separate a solid from a liquid in a homogenous mixture

The liquid evaporates away, leaving only the solid behind (evaporating water from salt)

Question 9

What is filtration?

Accepted Answer

A separation method to filter mixtures made of particles

Smaller particles pass through the filter, while larger particles get stuck

Question 10

What is magnetic separation?

Accepted Answer

A separation technique that separates magnetic substances from non-magnetic substances using a magnetic

Composition of Mixtures, AP Chemistry Flashcards