Chemistry Unit 2 Test Review

Question 1

An example of a pure substance is:

Accepted Answer

Water

Question 2

According to the Law of Definite Composition, any two samples of NaCl will have …

Accepted Answer

same mass ratio of elements

Question 3

My element name is:

Accepted Answer

Yttrium

Question 4

Which is not a physical property?

Accepted Answer

Toxicity

Question 5

The ________ have characteristics of both metals and nonmetals

Accepted Answer

metalloids

Question 6

The _______ of the periodic table are called periods.

Accepted Answer

rows

Question 7

What is a qualitative observation?

Accepted Answer

an observation that involves describing

Question 8

Which is an example of a Chemical property

Accepted Answer

Burning wood

Question 9

Which of the following is a Heterogeneous mixture?

Accepted Answer

Soil

Question 10

Applied research is research with

Accepted Answer

Clear uses and applications

Question 11

What is a physical property?

Accepted Answer

A property that can identify the object.

Question 12

What is matter?

Accepted Answer

Matter is anything that has mass and takes up space

Question 13

What is the chemical property

Accepted Answer

Reacts with air

Question 14

Which is an example of a pure substance?

Accepted Answer

Sugar

Question 15

An explanation you can test in an experiment is a...

Accepted Answer

hypothesis

Question 16

What is the scientific method?

Accepted Answer

Series of steps that scientists use to solve & answer problems.

Question 17

A scientific model is a

Accepted Answer

representation of a real event or object

Question 18

Which is a qualitative observation?

Accepted Answer

blue

Question 19

___________________ is a physical property.

Accepted Answer

color

Question 20

Physical or Chemical property? Malleability

Accepted Answer

Physical

Question 21

fluorine, chlorine, bromine, iodine, and astatine

Accepted Answer

halogens

Question 22

Energy can be stored in ____________ .

Accepted Answer

all of the above

Question 23

A scientific law that states that matter cannot be created or destroyed.

Accepted Answer

Conservation of Mass.

Question 24

Which of the following is NOT a qualitative observation?

Accepted Answer

There are 5 kids in the classroom.

Question 25

What element does the symbol Sn represent

Accepted Answer

Tin

Question 26

Is Pizza a Heterogeneous or Homogeneous Mixture?

Accepted Answer

Heterogeneous

Question 27

Can a pure substance be physically separated?

Accepted Answer

No

Question 28

Theory has to be supported by what

Accepted Answer

Facts, evidence and repeated testings

Question 29

Which of these is a Chemical Property

Accepted Answer

Combustible

Question 30

A pure substance is an example of an alloy

Accepted Answer

False

Question 31

Define Organic Chemistry.

Accepted Answer

the study of most carbon-containing compounds.

Question 32

Chemistry is the study of

Accepted Answer

composition & properties of matter.

Question 33

Observation may be

Accepted Answer

qualitative or quantitative

Question 34

Baking soda is a heterogeneous mixture

Accepted Answer

False

Question 35

Most elements on the periodic table are ____

Accepted Answer

metals

Question 36

Symbol of element

Accepted Answer

Mg

Question 37

What is Kinetic Energy?

Accepted Answer

Energy in motion

Question 38

Which is an example of Heterogeneous Mixture

Accepted Answer

All of the above

Question 39

Name of Element

Accepted Answer

Phosphorus

Question 40

Solubility is the chemical property

Accepted Answer

False

Question 41

Is Steel a Heterogeneous or Homogeneous Mixture?

Accepted Answer

Homogeneous

Question 42

What are the 6 branches of chemistry?

Accepted Answer

organic, physical, theoretical, analytical, bio, inorganic

Question 43

What is a pure substance?

Accepted Answer

Elements and compounds

Question 44

A pure substance made of only one kind of atom

Accepted Answer

element

Question 45

Definition of a controlled Experiment?

Accepted Answer

An experiment in which only one variable is changed at a time.

Chemistry Unit 2 Test Review

Questions 45

Chemistry Unit 2 Test Review

Questions 45