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Year 9 Conquering Chemistry

Total questions: 86

Worksheet time: 1hrs 21mins

Name
Class
Date
1.

Which one of these has a negative charge?

a)

an electron

b)

a neutron

c)

a proton

d)

noble gases

2.

What is the nucleus?

a)

The center of an atom made of neutrons and protons

b)

The outer shell of the atom

c)

A molecule made of two or more atoms

d)

A compound

3.

What charge does an oxygen ion have?

a)

+2

b)

-2

c)

+1

d)

-1

4.

How does an atom become a negatively charged ion?

a)

by receiving electrons

b)

by receiving protons

c)

by giving away electrons

d)

by giving away protons

5.

atomic number

a)

number of protons/stands for an element

b)

number of neutrons

c)

number of electrons

d)

number of protons and neutrons

6.

mass number

a)

number of protons

b)

number of electrons

c)

number of protons and electrons

d)

number of protons and neutrons

7.
The element Tellurium has the atomic mass of 127.60 and its atomic number is 52. How many neutrons are in the element Tellurium?
a)
179.60
b)
127.60
c)
52
d)
76
8.
The characteristics or properties of metals include
a)
shiny and solid
b)
ductile and malleable
c)
lose electrons
d)
all of the above
9.
Which particle does not contribute mass to the atom?
a)
Proton
b)
Neutron
c)
Electron
d)
Nucleus
10.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
11.
Angelina mixes 2 substances together in a beaker. The beaker becomes hot and the liquid changes color.
Did a chemical reaction occur?
a)
yes, because the properties changed and a new substance was made.
b)
no, because the properties did not change.
12.
Which of the following are NOT signs that a chemical reaction occured?
a)
the properties changed
b)
bubbles of gas formed
c)
color stays the same
d)
smells different
13.
Which of the following is NOT a chemical reaction?
a)
burning a marshmallow in a campfire.
b)
a campfire
c)
acid rain turning a copper roof green.
d)
Dissolving red Koolaid in water.
14.
Gold is an example of a(n) 
a)
pure element
b)
pure compound
c)
pure mixture
15.

Air is an example of a(n)

a)

element

b)

compound

c)

mixture

16.

A molecule is

a)

a singular particle of a particular element

b)

another name for an element

c)

2 or more atoms that are combined

17.

When an acid reacts with a metal following is the product

a)

salt + hydrogen

b)

salt + carbon dioxide + water

18.
What is the name of Ca3N2?
a)
calcium nitrogen
b)
carbon nitrogen
c)
calcium nitride
d)
carbon nitrate
19.
KNO3 is used in fertilizers as a source of potassium and nitrogen. If you want to buy fertilizer with this compound, what chemical name should you look for?
a)
potassium nitrate
b)
potassium nitrite
c)
potassium nitride
d)
potassium nitrogen
20.

What is the name of a mutivalent ionic compound made from copper (Cu2+) and oxygen?

a)

copper oxygen.

b)

copper oxide.

c)

dicopper oxide.

d)

copper(II) oxide.

21.

Formula for barium sulfide

a)

B2S3

b)

BaS

c)

Ba2S

d)

BaS2

22.

Formula for lead (II) chloride

a)

PbCl2

b)

Pb2Cl

c)

Pb2Cl3

d)

Pb3Cl2

23.

Name for LiOH

a)

lithium hydrogen oxide

b)

lithium hydroxide

c)

lithium (II) hydroxide

d)

lithium (I) hydroxide

24.

Formula for iron (II) carbonate

a)

FeCO3

b)

Fe2CO3

c)

FeCO2

d)

Fe2CO2

25.

Name for CO

a)

carbon monoxide

b)

carbon oxide

c)

monocarbon oxide

d)

carbide monoxide

26.

What does flammable mean?

a)

harms the eyes

b)

can catch on fire

c)

safe to use

27.
Which elements are found on the left to middle of The Periodic Table? 
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Candles
28.
Which elements are found on the right side of The Periodic Table?
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Water
29.
Which element is least likely to conduct heat and electricity? 
a)
O
b)
Si
c)
Po
d)
Ca
30.
Which element is a metalloid?
a)
Titanium
b)
Selenium
c)
Potassium
d)
Polonium
31.

The ability to be stretched into a wire

a)

Ductile

b)

Density

c)

Streak

d)

Mass

32.

Substance that is dull, brittle, and does not conduct electricity

a)

Metal

b)

Streak

c)

Nonmetal

d)

Metalloid

33.
Which has a bitter taste?
a)
Base
b)
Acid
c)
flagella
d)
cila
34.
Which has a pH below 7?
a)
Acid
b)
Base
35.
Turns litmus red
a)
Acids
b)
Bases
c)
All
36.

What pH is the strongest base?

a)

1

b)

7

c)

4

d)

14

37.
Which of the following is most likely to be basic:
a)
Lemon juice
b)
Vinegar
c)
Laundry detergent
d)
Coke
38.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
39.
Why are bases useful as cleaning products?
a)
They dissolve fats and oils
b)
they are corrosive, so they eat anything
c)
they don't mix with water
d)
since bases are slippery, they slip dirt off of surfaces
40.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
41.
Which of these pH values would indicate that a solution is a weak base?
a)
4
b)
5.6
c)
8
d)
13
42.

Which of the following is the strongest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

43.

Which of the following is the weakest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

44.

Which of the following is the strongest acid?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

45.

Solutions that have more OH– ions than H+ ions are

a)

acids

b)

bases

c)

enzymes

d)

neutral

46.

Solutions that have more H+ ions than OH- ions are

a)

acids

b)

bases

c)

enzymes

d)

neutral

47.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

48.
Acids react with
a)
water to produce bases and salts
b)
salts to produce bases and water
c)
neither bases, salts nor water
d)
bases to produce salts and water
49.
Which element has 31 protons ?
a)
Gallium 
b)
Germanium
c)
Gadolinium
d)
Polonium
50.
Oxygen’s atomic number is 8. This means that an oxygen atom must have
a)
8 electrons
b)
8 protons
c)
8 neutrons
d)
a mass number of 8
51.

In a word equation the REACTANTS

a)

Are written on the right hand side of the arrow

b)

Are produced in a chemical reaction

c)

Are always the same

d)

Are the substances that react together

52.

In a chemical reaction...

a)

New atoms are created

b)

Atoms rearrange

c)

Atoms are destroyed

d)

Nothing Happens

53.

Magneisum reacts with oxygen to form magnesium oxide. The correct word equation is...

a)

A

b)

B

c)

C

d)

D

54.

Ms. H set up an experiment to see how the type of ball affects the distance it rolls off a ramp. Identify the independent in this experiment.

a)

distance traveled by the ball

b)

height of the ramp

c)

the type of ball

55.

Mrs. Ditty wants to investigate which brand of plastic bag can withstand the most amount weight before ripping. Identify the dependent variable for her investigation.

a)

amount of plastic bags

b)

brand of plastic bags

c)

amount of weight

d)

same size plastic bags

56.

Mrs. Ditty wants to investigate which brand of garbage bag can withstand the most amount weight before ripping. Identify one possible control variable for her investigation.

a)

amount of garbage bags

b)

brand of garbage bags

c)

amount of weight

d)

same size garbage bags

57.

Factors that remain the same in an experiment to make it fair are called the

a)

controlled variables

b)

independent variable

c)

dependent variable

d)

tested variables

58.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
59.

John and Emily were experimenting with the effects of salt on plant growth. To do this, they watered plants daily with the same amount of salt water. They could best improve their experiment by

a)

increasing the amount of salt added to the water each day

b)

cooling the salt water before watering the plants

c)

adding food color to see how far the salt penetrates the plants

d)

watering half the plants with pure water and half with salt water

60.

A fair test is a __________ experiment.

a)

reliable

b)

valid

c)

accurate

d)

scientific

61.

A reliable experiment produces results which

a)

are consistent

b)

vary greatly

c)

are different from sample answers

d)

are not consistent

62.

To ensure results are reliable the experiment should be

a)

Done once

b)

Repeated and checked for consistency

c)

Done as exactly the same as the method outlines

d)

Repeated if necessary

63.

Results collected from repeat trials of an experiment should be

a)

averaged

b)

graphed

c)

added up

d)

subtracted

64.

Can results be reliable without being valid

a)

True

b)

False

65.

The hypothesis is a

a)

testable and informed prediction of the outcome of the investigation. It should include mention of both dependent and independent variable.

b)

testable and informed prediction of the outcome of the investigation. It should include mention of the dependent variable.

c)

testable and informed prediction of the outcome of the investigation. It should include mention of the independent variable.

66.

A method is valid if

a)

it allows you to test the hypothesis.

b)

it allows you to repeat the experiment multiple times.

c)

it allows you room for error.

d)

It allows you to draw a results table with averages.

67.

A method is valid if

a)

A list of equipment is provided

b)

Variables are controlled

c)

Variables are not controlled

d)

They are detailed,logical and easy to understand

68.
Ore is 
a)
any type of rock
b)
a rock with metals
c)
a rock with metals worth something to someone
d)
a rock with minerals
69.

a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted.

a)

Minerals

b)

Ore

c)

Oil

d)

Water

70.

Whether or not something is mined is determined by its monetary value.

a)

True

b)

False

71.

A list of elements that organizes them in order of their reactivity is called

a)

Negativity Series

b)

Netflix Series

c)

Activity Series

d)

Displacement Series

72.
Which metal is more reactive than calcium?
a)
magnesium
b)
potassium
c)
silver
d)
aluminum
73.

Indicate which of the following is more reactive.

a)

Iron

b)

Magnesium

74.

Determine the result of the following potential reaction.

Potassium added to cold water .

a)

Potassium added to cold water produces potassium hydroxide and hydrogen gas.

b)

Potassium added to cold water produces potassium oxide and hydrogen gas.

c)

No Reaction

75.
A neutralisation reaction is a reaction between 
a)
Acid and a Base 
b)
Acid and water 
c)
Base and water 
d)
None of the above 
76.
An acid reacts with metal to produce 
a)
Carbon dioxide 
b)
Hydrogen gas
c)
Hydrogen gas and water 
d)
Salt and hydrogen gas 
77.
An acid reacts with a metal carbonate to produce 
a)
Salt, water and hydrogen gas
b)
Salt, water and carbon dioxide
c)
Limewater
d)
Salt and water 
78.
What type of reaction is the following: 
HCl  + Zn --> ZnCl2 + H2
a)
Neutralisation
b)
Acid and a metal 
c)
Acid and a carbonate 
d)
Ionic 
79.
Complete the following reaction:
Sulphuric acid + sodium carbonate
--> 
a)
Carbon dioxide + water 
b)
calcium carbonate + water + carbon dioxide 
c)
Sodium sulphate + water + carbon dioxide 
d)
Sodium chloride + water + carbon dioxide 
80.
Which is the stronger acid?
a)
pH 1
b)
pH 4
c)
pH 8
d)
pH 13
81.
Which statement is true?
a)
Acids start with H and bases end with OH
b)
Acids start with OH and bases end with H
c)
Acids end with H and bases start with OH
d)
Acids end with OH and bases start with H
82.

Which of the following substances is an acid?

a)

Sodium chloride

b)

Hydrochloric acid

c)

Sodium bicarbonate

d)

Water

83.

Who arranged the known elements into horizontal rows of increasing atomic mass leaving gaps for as yet undiscovered elements?

a)

Mendeleev

b)

Meyer

c)

Newlands

d)

Moseley

84.

mendeleev arranged the elements according to ................

a)

atomic weight

b)

atomic number

85.
The usefulness of Mendeleev's periodic table was confirmed by
a)
the discovery of electrons
b)
the discovery of predicted elements
c)
its immediate acceptance by scientists
d)
the discovery of the nucleus
86.
Why did Mendeleev leave blanks in his periodic table?
a)
forgot elements
b)
left room for elements not yet discovered
c)
placed elements in wrong positions leaving gaps

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