Chapter 1

Question 1

What is Chemistry?

Answer 1

Study of composition,structure and properties of matter.

Question 2

Name the branches of chemistry.

Answer 2

1) Organic chemistry
2) Inorganic chemistry
3) Biochemistry
4) Physical chemistry
5) Theoretical chemistry
6) Analytical Chemistry

Question 3

Define Organic chemistry.

Answer 3

Study of carbon containing compounds.

Question 4

Define Inorganic chemistry.

Answer 4

Study of non-organic substances.

Question 5

Define Biochemistry.

Answer 5

Study of substances and processes occurring in living things.

Question 6

Define physical chemistry.

Answer 6

Study of properties and changes of matter and their relation to energy.

Question 7

Define theoretical chemistry.

Answer 7

The use of mathematics and computer in chemistry.

Question 8

Define analytical chemistry.

Answer 8

Identification of components and composition of material.

Question 9

Define scientific instruments?

Answer 9

Used to extend our ability to observe and make measurements.

Question 10

What is a chemical?

Answer 10

Any substance that has a definite composition.

Question 11

What are the key steps a scientist should do to experiment?

Answer 11

1) Basic research.
2) Applied research.
3) Technological development.

Question 12

What is basic research?

Answer 12

Increases basic knowledge.

Question 13

What is applied research?

Answer 13

Used for solving problems.

Question 14

What is technological development?

Answer 14

Production and use of products that improve the quality of life.

Question 15

What is an example of basic research?

Answer 15

Studying how atoms work.

Question 16

What is an example of applied research?

Answer 16

Finding a cure for a disease.

Question 17

What is an example of technological development?

Answer 17

Inventing a new smartphone.

Question 18

What is matter?

Answer 18

Measure of the amount of matter.

Question 19

What is volume?

Answer 19

The amount of three dimensional space an object occupies.

Question 20

What is matter made of?

Answer 20

Atoms and molecules.

Question 21

What is the smallest unit of element that maintains the chemical identity of that element?

Answer 21

Atom.

Question 22

(True or False) atoms in an element are not joined together.

Answer 22

True.

Question 23

What is an element?

Answer 23

A pure substance made of only one kind of atom.

Question 24

What is a compound?

Answer 24

A substance that is made up of two or more elements that are chemically bonded.

Question 25

All properties of matter are either ______ or _______.

Answer 25

Physical or chemical property.

Question 26

Physical property can be separated into two parts what are they?

Answer 26

Intensive and extensive.

Question 27

What is physical property?

Answer 27

A characteristic that can be observed without changing the substance.

Question 28

What does extensive property depend on?

Answer 28

The amount of matter that is present. In which intensive property does not depend on.

Question 29

What are some examples of extensive property?

Answer 29

Mass and volume.

Question 30

What are some of examples of intensive property?

Answer 30

Density, color, boiling point and melting point.

Question 31

What are some physical changes?

Answer 31

Blending, shredding paper, and chopping wood.

Question 32

When does change of state occur?

Answer 32

Only at molecular level and in distance separating at molecules.

Question 33

Why does solid have definite shape and definite volume?

Answer 33

Because the particles are packed together.

Question 34

Why does liquid have indefinite shape and definite volume?

Answer 34

Because the particles can move past one another and are not fixed together.

Question 35

Why do gases have neither definite shape or definite volume?

Answer 35

Because the particles are very far from each other.

Question 36

What is the meaning of chemical property?

Answer 36

Chemical properties relate to a substance ability to undergo changes that transform it into substances.

Question 37

What are some examples of chemical property?

Answer 37

Flammability, explosiveness, reactivity, burning wood and rotting banana.

Question 38

What are reactants?

Answer 38

The ingredients of a chemical reaction.

Question 39

What is the product in a chemical reaction?

Answer 39

It is the result of the chemical reaction.

Question 40

Reactants —-> _________

Answer 40

Product.

Question 41

(True or False) after a chemical reaction, the amount of the original substanc are less than before.

Answer 41

True.

Question 42

Matter can or seperated into 2 parts, name them.

Answer 42

Mixtures and pure substance.

Question 43

Slide 35.

Question 44

What is a mixture?

Answer 44

A blend of two or more kinds of matter are mixed together physically and can be separated.

Question 45

What are the two types of mixture?

Answer 45

Homogeneous mixture and heterogeneous mixture.

Question 46

What is a pure substance?

Answer 46

Fixed composition that is homogeneous.

Question 47

What are the methods of separating mixtures?

Answer 47

1) Sieving 2) Evaporation 3) Filtration 4) Sedimentation

Question 48

What are metals?

Answer 48

Hard lustrous shiny objects that are malleable and ductile, and can conduct electricity and transfer energy.

Question 49

Why are metals ductile and malleable?

Answer 49

Because they have high tensile strength which is the ability to resist, breaking when pulled

Question 50

What is the meaning of malleable?

Answer 50

The ability to be harmed or rolled into thin sheets.

Question 51

What is the meaning of ductile?

Answer 51

The ability to be drawn to fine wire.

Question 52

Many nonmetals are ______ in room temperature.

Answer 52

Gases.

Question 53

What is a homogeneous mixture?

Answer 53

the components of the mixture are evenly distributed.

Question 54

What is a heterogeneous mixture?

Answer 54

The components of the mixer is not evenly distributed.

Question 55

What is a heterogeneous mixture?

Answer 55

The components of the mixer is not evenly distributed.

Question 56

What’s the most common name for group 18 elements on the periodic table in which states are they and what type of element are they?

Answer 56

Group elements are most commonly called noble gases. They all gases at room temperature and are classified as nonmetals.