Chemistry Chap 1

Question 1

The primary motivation behind basic research is to-

Answer 1

gain knowledge

Question 1

Technological Development of a chemical product often

Answer 1

Lags behind basic research on the same substance

Question 2

Applied Research

Answer 2

Solve a particular problem

Question 3

Chemistry is usually classified as

Answer 3

A physical science

Question 4

Define the six major branches of chemistry

Answer 4

ORGANIC
INORGANIC
PHYSICAL
ANALITIC
BIO
THEORETICAL

Question 5

3 Basic instruments used in chem

Answer 5

Thermometer, Pine pen, beaker,

Question 6

What are Microstructures

Answer 6

Too small to be seen with the naked eye

Question 7

What is a chemical

Answer 7

A substance with a definite composition

Question 8

What is Chemistry

Answer 8

Study of composition, properties & interaction with matter

Question 9

Heterogeneous Substance

Answer 9

A mix of solutions that is not mixed 100%

Question 10

Homogeneous Substance

Answer 10

A mix of solutions is mixed 100%

Question 11

Physical change with EX

Answer 11

Doesn’t change the components, just the visual one ( Ice melting )

Question 12

Chemical Change with EX

Answer 12

Changes the substance into something new with different properties ( paper burning, smoke & ash )

Question 13

Mass

Answer 13

Measure of the amount of Matter

Question 14

Matter

Answer 14

Anything that has mass & take up space ( made of )

Question 15

Physical property

Answer 15

A characteristic you can observe or measure without changing the substance. Examples: color, shape, melting point.

Question 16

Chemical property

Answer 16

How a substance reacts to form new substances. Examples: flammability, reactivity with acid.

Question 17

Homogeneous Mixture

Answer 17

Has a uniform composition

Question 18

heterogeneous Mixture

Answer 18

Is not Uniform composition

Question 19

How is energy involved in chemical & physical changes?

Answer 19

Energy is either absorbed or given off in all chemical & physical changes, but it’s neither created nor destroyed.

Question 20

A horizontal row of elements is called

Answer 20

A period

Question 21

Elements that are good conductors of heat

Answer 21

Metals

Question 22

Poor conductors of heat

Answer 22

non-metals

Question 23

Vertical column of elements in the periodic table is called a-

Answer 23

group

Question 24

The ability of a substance to be hammered or rolled

Answer 24

Malleability

Question 25

At room temperature most metals are-

Answer 25

Solid

Question 26

Name 3 characteristics of non-metals

Answer 26

Don't conduct electricity, nor heat, brittle, low boiling point

Question 27

Name 3 characteristics of Metals

Answer 27

Malleable, ductile, good conductors of heat/electricity, shiny,

Question 28

Name 3 characteristics of metalloids

Answer 28

Semi-conductors od electricity, solid at room temperature, less malleable

Question 29

Name two characteristics of noble gases

Answer 29

Gas at room temperature, mostly un-reactive

Question 30

Atom & Compound

Answer 30

The smallest unit of an element that retains its chemical properties. It’s like a tiny building block of matter. / A substance made of two or more different elements that are chemically bonded together. It’s like a recipe where different ingredients are combined to make something new.