Exam 1

Question 0

Matter

Answer 0

Is anything that has mass and occupies space

Question 1

Chemistry

Answer 1

Deals with the properties and reactions of substances

Question 2

Atom

Answer 2

Smallest particle of an element that retains the chemical properties of that element

Question 3

Element

Answer 3

A type of matter that cannot be broken down into 2 or more pure substances. An example is aluminum

Question 4

Compound

Answer 4

A pure substance that contains more than one element. For example water or methane

Question 5

Physical property

Answer 5

Such as melting point or density which can be determined without changing the chemical identity of a substance

Question 6

Physical change

Answer 6

Doesn’t change the identity of a substance

Question 7

Chemical property

Answer 7

Of a substance that is observed during a chemical reaction

Question 8

Chemical change

Answer 8

Does change the identity of a substance

Question 9

Mixture

Answer 9

Contains two or more substances combined in such a way that each substance retains its chemical identity

Question 10

Separation methods:

Answer 10

Filtration- used to separate a heterogenous solid liquid mixture
Distillation- used to resolve a homogenous solid liquid mixture/ heating or cooling
Chromatography- used to separate all kinds of mixtures

Question 11

Homogenous mixture/solution

Answer 11

Uniform mixtures are one in which the composition is the samea throughout
Examples - seawater

Question 12

Heterogenous mixture

Answer 12

Non uniform mixtures are those in which the composition varies throughout
Examples- most rocks

Question 13

Pure substance

Answer 13

Has it’s own unique set of properties that serve to distinguish it from all other substances
Examples- intensive and extensive

Question 14

Extensive

Answer 14

Which depends upon the amount if sample

Example- volume

Question 15

Intensive

Answer 15

Which is independent of the amount of the sample

Example- density

Question 16

Vertical columns

Answer 16

Groups or families

Question 17

Alkali metals

Answer 17

Group one

Question 18

Alkaline earth metals

Answer 18

Group 2

Question 19

Transition metals

Answer 19

Groups 3-12

Question 20

Halogens

Answer 20

Group 17

Question 21

Noble gases

Answer 21

Group 18

Question 22

Horizontal rows

Answer 22

Called periods

Question 23

Metals

Answer 23

Located left of staircase

Question 24

Non-metals

Answer 24

Located right of staircase

Question 25

Metalliods

Answer 25

Located on staircase

Question 26

Properties of metals

Answer 26

Good conducted of heat and electricity Malleable- hammered into thin sheets Ductile-drawn into wires Lusteras- shiny

Question 27

Properties of non-metals

Answer 27

Not a good conductor of heat and electricity Most of all the non-metals are gases When in solid form they are brittle- breaks without bending

Question 28

Properties of metalloids

Answer 28

B,Si,Ge,As,Sb,Te not malleable as metals, not as brittle as non-metals Semi-conductors , in computer chips

Question 29

What are SI units?

Answer 29

Are units used all around the works instead of using the metric system and other systems

Question 30

What are 5 SI base units?

Answer 30

``` Length-meters(m) Mass-grams(g) or kilograms(kg) Time-seconds(s) Temperature-Kelvin(k) Amount of substance-mole(mol) ```