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Chemistry 1 Review

Total questions: 85

Worksheet time: 1hrs 4mins

Name
Class
Date
1.

Match the following

a)

Located in the nucleus; have a positive charge; and a mass of 1 amu

1.

Protons

b)

Located outside of the nucleus; have a negative charge; and a mass of 1/2000th of an amu

2.

electrons

c)

located in the nucleus; have no charge; and no charge

3.

neutrons

2.

Which of the following is a compound

a)

water

b)

hydrogen

c)

nitrogen gas

d)

oxygen

3.

Uranium has an atomic number of 92 and an atomic mass of 238. What is the number of neutrons in Uranium?

(a)  

4.

Elements with similar qualities are located in the same

(a)  

5.

elements are placed in the periodic table based on the number of

a)

neutrons

b)

electrons

c)

protons

d)

protons + neutrons

6.

What is an atom?

a)

The smallest unit of an element that displays the properties of that element.

b)

A type of particle made up of two or more elements.

c)

Two or more different elements joined together.

d)

A particle that has a positive or negative charge.

7.

Which of the following is NOT located in the nucleus?

a)

Protons

b)

Neutrons

c)

Electrons

d)

None of the Above.

8.

What type of elements are highlighted pink?

a)

Ionic Compounds

b)

Metalloids

c)

Metals

d)

Non Metals

9.

Which line points to the atomic number of Carbon?

a)

A

b)

B

c)

C

d)

D

10.

The electrons on the outermost shell of an atom are called:

a)

Polar Electrons

b)

Outer Electrons

c)

Negative Electrons

d)

Valence Electrons

11.

This is the Bohr Rutherford Model for which element?

a)

Boron

b)

Lithium

c)

Beryllium

d)

Carbon

12.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
a)
15
b)
31
c)
16
d)
47
13.
An electron has what kind of charge?
a)
no charge
b)
positive 
c)
negative
d)
it depends
14.
a proton has what charge?
a)
positive
b)
negative
c)
no charge
d)
it depends
15.
How many valence electrons does Neon have?
a)
18
b)
8
c)
10
d)
2
16.

Which subatomic part of an atom gives it a positive charge?

a)

Neutron

b)

Proton

c)

Electron

d)

Nucleus

17.

What is a mixture?

a)

elements chemically combined

b)

a combination of different substances

c)

composed of one atom only

d)

it is made of chemical

18.

It is a type of mixture that has the SAME COMPOSITION in every part.

a)

Homogenous

b)

Heterogeneous

19.

Salad is an example of a _____________.

a)

homogeneous mixture

b)

heterogeneous mixture

20.

When two or more substances are combined so each can be separated by physical means, the result is a(n) _____.

a)

chemical change

b)

compounds

c)

mixture

d)

element

21.
Is water an element or a compound?
a)
Element
b)
Compound
22.

A compound consists of two or more elements chemically combined.

a)
True
b)
False
23.
A pure substance CAN'T BE separated physically. 
a)
True
b)
False
24.

A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity and is made of only one kind of material.

a)

mixture

b)

pure substance

c)

compound

d)

element

25.

Matter is anything that occupy space and has mass. It can be classify into two(2), what are those classification?

a)

Homogeneous and Heterogeneous

b)

Elements and Compounds

c)

Pure substances and Mixtures

d)

Solute and Solvent

26.

Nitrogen (N), Oxygen (O), Carbon (C) and Hydrogen are the most common example of ?

a)

Molecules

b)

Elements

c)

Compounds

d)

Substances

27.

It is a form of matter which mean it has a one

type of atom or molecule.

a)

Substance

b)

Element

c)

Compound

d)

Mixtures

28.

It is a combination of two or more substances.

a)

Substances

b)

Mixtures

c)

Elements

d)

Compound

29.

It is a mixture with a non-uniform composition.

a)

Homogeneous mixture

b)

Solvation process

c)

Heterogeneous mixture

d)

Solubility

30.

This is a mixture of two or more substances in which one or more of these substances (solutes) is dissolved in another substance.

a)

Compound

b)

Element

c)

Heterogeneous mixture

d)

Homogeneous mixture

31.

What is the best method of separation for removing salt from salt water.

a)

Sifting

b)

Sorting

c)

Evaporation

d)

Magnetic attraction

e)

Filtration

32.

What is the best method of separation for removing sand from water?

a)

Sifting

b)

Sorting

c)

Evaporation

d)

Magnetic attraction

e)

Filtration

33.

Which of the following in NOT an example of a mixture?

a)

Macaroni and cheese

b)

Chocolate milk

c)

Aluminum can

d)

Salt water

34.

When substances are combined as a mixture, _______________.

a)

they keep their physical properties

b)

their physical properties combine

c)

their physical properties change

d)

they lose some of their physical properties

35.

Water is made up of hydrogen and oxygen, two elements that were chemically combined. This makes water a(n)

a)

atom

b)

compound

c)

element

d)

mixture

36.

An element is a ___ that cannot be separated into simpler substances by physical or chemical means.

a)

pure substance

b)

mixture

c)

solution

d)

compound

37.

Which of the following is a heterogenous mixture?

a)

neon

b)

soil

c)

steel

d)

salt water

38.

Which of the following is a homogeneous mixture?

a)

sand in a bottle

b)

lemonade

c)

Mercury

d)

salad

39.

Which of the diagrams below represent a mixture?

a)

A

b)

B

c)

C

d)

D

40.

What does the C represent?

a)

atomic mass

b)

atomic number

c)

element name

d)

chemical symbol

41.

What does the 6 represent?

a)

atomic mass

b)

atomic number

c)

element name

d)

chemical symbol

42.

What does 12.011 represent?

a)

atomic mass

b)

atomic number

c)

element name

d)

chemical symbol

43.

Which pair of elements has the most similar properties?

a)

Be and B

b)

O and S

c)

H and Hg

d)

Na and F

44.

A chemical property describes how matter __________.

a)

smells

b)

reacts with another type of matter

c)

looks under a microscope

d)

dissolves when made into a solution

45.

Physical properties are to __________, as chemical properties are to __________.

a)

chemical changes; physical changes

b)

physical changes ; chemical changes

c)

matter ; matter

d)

chemical reactions ; chemical reactions

46.

Which of the following is true?

a)

A physical property can only be seen.

b)

A physical property describes how matter can change when exposed to air.

c)

A physical property is something that can be observed about the substance by itself.

d)

A physical property can only be observed when two types of matter interact.

47.

A chemical property describes how matter __________.

a)

smells

b)

reacts with another type of matter

c)

looks under a microscope

d)

dissolves when made into a solution

48.

Physical properties are to __________, as chemical properties are to __________.

a)

chemical changes; physical changes

b)

physical changes ; chemical changes

c)

matter ; matter

d)

chemical reactions ; chemical reactions

49.

Which of these would NOT be chemical properties of oxygen?

Check all that are true.

a)

has no color

b)

reacts to moisture and iron to form rust

c)

helps many substances burn

d)

has no odor

50.

A physical change can change the __________ of a substance but cannot form new matter.

Check all that are true.

a)

state

b)

size

c)

color

d)

shape

51.

Which statement best describes what is happening in the images?

a)

a physical change

b)

a chemical change

c)

both a physical and a chemical change

d)

dissolving

52.

Jack leaves solid butter near a warm surface. When Jack returns, the butter has turned into a liquid. Jack's friend Elijah insists this is a chemical change. Is Elijah right?

a)

no, because no new matter was formed

b)

yes, because the matter changed states

c)

no, because the butter didn’t have enough time to go through a chemical change

d)

yes, because melted butter is a new type of matter

53.

Imagine the substances below are combined. None of them dissolve and no new matter is created. What happened?

a)

A physical change that is a solution.

b)

A physical change that is a mixture.

c)

A chemical change that is a mixture.

d)

A chemical change that is a solution.

54.

When combined, the powder and water create a solution because the powder dissolves evenly into the water. This is an example of a __________. If the water were evaporated from the solution, the powder would __________.

a)

physical change ; have disappeared

b)

physical change ; remain

c)

chemical change ; be a new matter

d)

chemical change ; remain

55.

Fireworks can be many different colors. The color depends on the mix of chemicals inside the fireworks. When the different chemicals ignite, they each produce different colors. Which of the following is true about fireworks?

a)

The fireworks’ color is caused by matter dissolving.

b)

A chemical change causes the fireworks’ color.

c)

Neither a physical nor a chemical change causes the fireworks’ color.

d)

A physical change causes the fireworks’ color.

56.

Which of these are most likely to cause a chemical change?

Check all that are true.

a)

folding

b)

rusting

c)

cooking

d)

burning

57.

True or false?

Clues like color change, bubbles, and odors guarantee a chemical change has occurred.

a)

False, these are all clues to only physical changes.

b)

True, all are signs that a chemical change has definitely occurred.

c)

False, some of these clues can be either physical or chemical changes.

d)

False, no clues to chemical changes exist.

58.

two or more atoms of different elements joined together

a)

molecule

b)

compound

c)

mixture

d)

solution

59.

a combination of symbols that shows the element(s) in a molecule or compound and the ratio of atoms

a)

mathematical formula

b)

mathematical equation

c)

chemical formula

d)

chemical equation

60.

a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products

a)

mathematical formula

b)

mathematical equation

c)

chemical formula

d)

chemical equation

61.

a number after an element symbol in a chemical formula that indicates how many atoms of that element are in that molecule or compound

a)

denominator

b)

coefficient

c)

numerator

d)

subscript

62.

a number in front of a chemical formula that indicates how many molecules or compounds of each reactant and product are involved in a reaction

a)

denominator

b)

coefficient

c)

numerator

d)

subscript

63.

a substance that takes part in and undergoes change during a reaction.

a)

coefficient

b)

subscript

c)

reactant

d)

product

64.

a substance that forms in a chemical reaction

a)

coefficient

b)

subscript

c)

reactant

d)

product

65.

How many oxygen atoms are in the products for the chemical reaction below?
4Fe + 3O2 → 2Fe2O34Fe\ +\ 3O_{2\ }\rightarrow\ 2Fe_2O_3  

a)

2

b)

3

c)

5

d)

6

66.

How many atoms are in the products below?
4Fe +3O2 → 2Fe2O34Fe\ +3O_{2\ }\rightarrow\ 2Fe_2O_3  

a)

7

b)

10

c)

17

d)

20

67.

According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?

a)

The wood disappears.

b)

It stays the same chemically.

c)

The atoms in the wood and oxygen rearrange and form smoke and ash.

d)

Nothing.

68.

When sodium and chlorine combine to form sodium chloride, sodium chloride is the:

a)

Originator

b)

Reactant

c)

Product

d)

Produce

69.
What two types of measurements make up DENSITY? 
a)
Mass and Volume
b)
Temperature and Mass
c)
Grams and Centimeters
d)
Volume and Weight
70.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
71.
Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?
a)
8 g/cm3
b)
2 g/cm3
c)
1/2 g/cm3
d)
24 g/cm3
72.
What units are used to measure mass?
a)
g
b)
cm3
c)
g/cm3
d)
cm3/g
73.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
74.
Which units of measurement are used for volume?
a)
grams
b)
centimeters
c)
grams/milliliter
d)
milliliter
75.
True or False: a physical change may produce a new substance.
a)
True
b)
False
76.
Which of the following is an example of a precipitate?
a)
liquid evaporating into gas
b)
a solid formed from a frozen liquid
c)
a chunk solid formed from two liquids combining
d)
a liquid solution that contains two substances
77.
Which of the following is an example of a physical change?
a)
sugar and oxygen reacting to produce water and carbon dioxide
b)
honey dissolving in tea
c)
a raw egg being cooked
d)
metal rusting after being left out in the rain
78.
A physical change can sometimes result in a color change. Which of the following situations show this?
a)
Milk turns yellow when it spoils.
b)
Dough becomes darker when it is baked into cake.
c)
A red candy dissolves and turns water pink.
d)
A match turns black when it is burned.
79.
A copper penny turning greenish after a few years is an example of ...
a)
Chemical Change
b)
Physical Change
80.
Bubbles form when two or more substances are combined ...
a)
Chemical Change
b)
Physical Change
81.
A change in the size, shape, or state of matter.
a)
chemical change
b)
physical change
82.

C3H5(NO3)3

a)

C = 3, H = 5, N = 3, O = 9

b)

C = 3, H = 5, N = 1, O = 9

c)

C = 9, H = 15, N = 3, O = 9

d)

C = 9, H = 15, N = 1, O = 3

83.

4CF2Cl2

a)

C = 4, F = 4, Cl = 2

b)

C = 1, F = 8, Cl = 8

c)

C = 4, F = 8, Cl = 8

d)

C = 1, F = 4, Cl = 8

84.

How many different elements are present in this molecule?

3 NH4C2H3O2

a)

15

b)

36

c)

5

d)

4

85.

How many Sodium atoms are in 6NaCl?

a)

1

b)

12

c)

6

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