Chapter 2.9 Classification of Mixtures

Question 1

Heterogeneous Mixture

Answer 1

one of more visible boundaries between the components

ex. Rocks, milk, blood

Question 2

Homogeneous Mixture (solution)

Answer 2

no visible boundaries because components are individual atoms, ion or molecules
ex. sugar + water = there molecules are uniformly intermingled in the mixture

Question 3

Aqueous Solutions

Answer 3

solutions in water

Question 4

How are mixtures different from compounds? (3)

Answer 4

1. proportions of the components can vary
2. the individual properties of the components are observable
3. The components can be separated by physical means

Question 5

OVERVIEW: Matter

Answer 5

• Anything with mass and volume

* Exists in three physical states: solids, liquid, gas

Question 6

OVERVIEW: Mixtures

Answer 6

• two or more elements or compounds in variable proportions

* components retain their properties

Question 7

OVERVIEW: Heterogeneous Mixtures

Answer 7

• Visible parts

* Differing regional composition

Question 8

OVERVIEW: Homogeneous Mixtures

Answer 8

• NO visible parts

* same composition throughout

Question 9

OVERVIEW: Substances

Answer 9

fixed composition throughout

Question 10

OVERVIEW: Elements

Answer 10

• composed of one type of atom
• metal, nonmetal, or metalliod
• simplest type of matter that retains characteristic properties
• can be diatomic or polyatomic

Question 11

Atomic Mass of an Element

Answer 11

the average of isotopic masses weighted by abundance

Question 12

OVERVIEW: Compounds

Answer 12

• two or more elements combined in fixed parts by mass
• properties differ from those of components elements
• molecular mass is sum of atomic masses