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Chemistry Review 2022

Total questions: 80

Worksheet time: 55mins

Name
Class
Date
1.

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

a)

Neutron

b)

Proton

c)

Electron

d)

Nucleus

2.

What is the smallest 'building block' of the elements that make up the universe?

a)

An atom

b)

An electron

c)

A proton

d)

A cell

3.

An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?

a)

0

b)

7

c)

6

d)

13

4.

A certain atom of oxygen contains 8 protons, 8 neutrons, & 8 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom?

a)

It has 9 neutrons in its nucleus.

b)

It is an isotope of oxygen.

c)

Its atomic mass is a decimal number.

d)

It cannot be an atom of oxygen.

5.

An atom of neon has 8 valence electrons. What will an atom of neon MOST likely do to be stable?

a)

Gain 1 electron

b)

Lose 2 electrons

c)

Lose 8 electrons

d)

Neither gain nor lose any valence electrons

6.

A substance with a pH of 8 is a

a)

acid

b)

base

c)

neutral

7.

Carbon has 4 valence electrons which means

a)

it can only form bonds with carbon

b)

it is stable

c)

it can make ionic bonds

d)

it wants to make 4 covalent bonds

8.

The electrons in the outermost energy level are called

a)

valence

b)

ions

c)

covalent

d)

farthest out

9.

This reaction is showing energy being _____________

a)

Absorbed

b)

Released

c)

There is no change in energy shown

10.

Acids have more ______ ions than bases

a)

OH-

b)

H-

c)

OH+

d)

H+

11.

If salt is dissolved in water, water is the ____________

a)

Solution

b)

Solute

c)

Solvent

d)

Suspension

12.

Which of the following would be considered most acidic?

a)

1

b)

3

c)

7

d)

13

13.

The image shows the periodic grid for SODIUM. What is Sodium's atomic mass?

a)

11

b)

12

c)

23

d)

Impossible to tell

14.

What element will have the most similar physical and chemical properties to the element Sulfur (S)?

(click on the periodic table to expand it!)

a)

Carbon (C)

b)

Phosphorous (P)

c)

Oxygen (O)

d)

Neon (Ne

15.
The _______ describes the atoms in a compound.
a)
chemical equation
b)
chemical formula
c)
chemical symbol
d)
coefficient
16.
A _________ is a solid that forms during a chemical reaction.
a)
precipitate
b)
solute
c)
solvent
d)
gas
17.
Which is NOT an example of a chemical change.
a)
steam from a coffee cup
b)
burning socks
c)
forming precipitate
d)
getting warmer
18.
When a chemical reaction happens
a)
bonds must be broken and reformed
b)
chemicals don't collide
c)
atoms keep their arrangements
d)
chemicals keep their same properties
19.
The substances that are formed in a chemical reaction are called _________
a)
products
b)
reactants
c)
symbols
d)
formulas
20.

The big number on the front of the chemical formula is called the ______

a)

Coefficient

b)

Element Symbol

c)

Subscript

d)

Atomic Number

21.

How many of each element are in 3Al2(SO4)3

a)

6Al, 9S, 36O

b)

3Al2, 3S, 12O

c)

18Al, 9S, 12O

d)

6Al, 12SO

22.

The trends on the periodic table are dependent on..

a)

how attracted a valence electron is to the nucleus

b)

how attracted valence electrons are to each other

c)

how attracted a valence electrons is to a non valence electron

d)

how attracted a non valence electron is to the nucleus

23.

What makes a valence electron more attracted to the nucleus?

a)

less distance between the nucleus and having less protons

b)

less distance between the nucleus and having more protons

c)

more distance between the nucleus and having less protons

d)

more distance between the nucleus and having more protons

e)

less distance and having more valence electrons

24.

What is the tendency of an atom to attract electrons towards itself in a bond?

a)

atomic radius

b)

ionization energy

c)

shielding

d)

Electronegativity

25.

The higher the ionization energy...

a)

the more attracted the valence electron is to the nucleus so it is harder to remove

b)

the less attracted the valence electron is to the nucleus so it is easier to remove

c)

the more attracted the valence electron is to another electron, so it is harder to remove

d)

the more repelled a valence electron is to another electron, so it is easier to remove

26.

Why does ionization energy decrease going down a group?

a)

Adding more energy levels makes the ve- further from the nucleus so it is easier to remove

b)

There are more valence electrons in the outer shell so the ve- is easier to remove

c)

There are more protons in the nucleus so the ve- is easier to remove

d)

There are less protons in the nucleus so the ve- is easier to remove

27.
Why does electronegativity increase across a period?
a)
Adding more energy levels makes the ve- further from the nucleus
b)
There are more valence electrons in the outer shell
c)
There are more protons  in the nucleus
d)
There are less protons in the nucleus
28.
Which is smaller... Mg or Mg2+ ?
a)
Mg because it gains an energy level
b)
Mg due to extra electron repulsion
c)
Mg2+ because of extra electron repulsion
d)
Mg2+ because it loses an energy level
29.
List the following in order of weakest to strongest ionization energy.
P, Cs, Co, Sr
a)
P, Co, Sr, Cs
b)
Cs, Sr, Co, P
c)
Sr, Cs, Co, P
d)
P, Co, Cs, Sr
30.
List the following from largest to smallest atomic radius.
P, Cs, Co, Sr
a)
P, Co, Sr, Cs
b)
P, Cs, Co, Sr
c)
Cs, Sr, Co, P
d)
Sr, Cs, Co, P
31.

Why doesn't having more protons increase the attraction down a column?

a)

there are more valence electrons in the outermost energy level

b)

actually, there aren't more protons in the nucleus down the column

c)

as energy levels are added, non-valence electrons block the extra protons from attracting ve-

d)

more neutrons block the extra protons

32.

What happens to atomic radius across a period?

a)

the atoms get bigger because the nucleus is bigger as more protons are added

b)

the atoms get bigger because there are more ve-

c)

the atoms get smaller because with more attraction to the extra protons, the e- cloud moves closer to the nucleus

d)

the atoms get bigger because there are more energy levels

33.

Nitrogen is a _ so it will _ electrons when forming an ion.

a)

metal, lose

b)

metal, gain

c)

nonmetal, lose

d)

nonmetal, gain

34.

Nitrogen will gain _ ve- to have a charge of _.

a)

5 , -5

b)

3, +3

c)

3, -3

d)

5, +5

35.

A full valence shell is considered having _ ve-.

a)

0

b)

2

c)

6

d)

8

36.

Which of the following lose all their ve- when forming an ion?

a)

metals

b)

nonmetals

c)

metalloids

d)

depends on how many ve- the element has

37.

Which has a higher electronegativity.. Rb or Sr?

a)

Rb, because with more p+ in its nucleus it attracts e- more

b)

Sr, because with more p+ in its nucleus it attracts e- more

c)

Rb, because with more nrg levels the ve- are closer to/ more attracted to the nucleus

d)

Sr, because with more nrg levels the ve- are closer to/ more attracted to the nucleus

38.

Which has a higher ionization energy.. N or As?

a)

N, because with more p+ in its nucleus it attracts e- more making them harder to remove.

b)

As, because with more p+ in its nucleus it attracts e- more making them harder to remove.

c)

As, because with less nrg levels the ve- are closer to/ more attracted to the nucleus making them harder to remove.

d)

N, because with less nrg levels the ve- are closer to/ more attracted to the nucleus making them harder to remove.

39.

Look at the bohr models of Li and Be. Imagine the first valence electron was already removed from both atoms, and now you are going to remove the second valence electron. The energy required to remove the second valence electron is called second ionization energy. Would lithium or beryllium have a higher second ionization energy ?

a)

Li, because it has more protons

b)

Be, because it has more protons

c)

Li, because the second valence electron comes from an energy level closer to the nucleus

d)

Be, because the second valence electron comes from an energy level closer to the nucleus

e)

Li, because the beryllium has two valence electrons that repel each other

40.
Anything that takes up space and has mass is known as _______________.
a)
Matter
b)
Molecules
c)
Compounds
d)
Stuff
41.
What are the building blocks of MATTER?
a)
Atoms
b)
Cells
c)
Protons
d)
Neutrons
42.
What are the positively charged particles in an atom?
a)
Protons
b)
Neutrons
c)
Electrons
43.
The nucleus of an atom is made up of...
a)
Protons and Neutrons
b)
Neutrons and Electrons
c)
Protons and Electrons
44.

The statements below are the steps involved in an investigation.


P Making hypothesis

Q Identifying and controlling variables

R Identifying problem

S Collecting data

T Making conclusion

U Interpreting data

Which of the following is the correct sequence?😄


a)

P, Q, R, S, T, U

b)

Q, P, R, T, S, U

c)

R, P, Q, S, U, T

d)

R, Q, P, U, S, T

45.

Which of the following is done if a hypothesis is rejected in an experiment?

a)

A theory is made

b)

Variables are changed

c)

A new hypothesis is made

d)

The scientific concept is changed

46.

The mass of one mole of the substance in grams

is the meaning for ...

a)

Mole

b)

Molar mass

c)

Relative atomic mass

d)

Number of particle

47.
A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of
a)
Organic
b)
Inorganic
c)
Analytical
d)
Physical
48.
The smallest unit of matter that retains the properties of that matter is
a)
a molecule
b)
a compound
c)
a mixture
d)
an atom
49.
Which statement best describes an element?
a)
any combination of two or more atoms of different types
b)
a pure substance made up of only one kind of atom
c)
a substance containing only carbon atoms
d)
any kind of crystal
50.
Which of the following changes is a physical change of matter?
a)
water evaporating
b)
paper burning
c)
a nail rusting
d)
a silver spoon tarnishing
51.
Which of the following changes is a chemical change of matter?
a)
ice melting to produce water
b)
vinegar combining with baking soda to produce carbon dioxide
c)
water boiling to produce water vapor
d)
liquid silica solidifying to form glass
52.
Which of the following is an example of a heterogeneous mixture?
a)
tap water
b)
chunky peanut butter
c)
orange-colored sugar water
d)
gold ring
53.
Which of the following is a pure substance?
a)
air
b)
granite
c)
water
d)
stainless steel
54.
The horizontal rows of the periodic table are called
a)
periods
b)
columns
c)
groups
d)
families
55.
Which of these recorded observations is qualitative, rather than quantitative?
a)
A chemical reaction is complete in 2.3 s.
b)
The solid has a mass of 23.4 g.
c)
The compound melts at 87.5C.
d)
Iron is denser than aluminum.
56.
Which of these statements is true of the scientific method?
a)
The steps may vary somewhat to suit the experiment.
b)
Working scientists rarely use it.
c)
Scientists must follow its steps exactly.
d)
Scientists rarely publish results of experiments.
57.
Theories are considered successful only if they
a)
can be used to make accurate predictions.
b)
can be stated in simple terms.
c)
can be written in the form of an equation.
d)
have been accepted by all scientists. 
58.
The SI base units for time and temperature are
a)
hour and degree Celsius.
b)
second and degree Celsius.
c)
hour and kelvin.
d)
second and kelvin.
59.
Which of these shows SI unit prefixes arranged in order from smallest to largest?
a)
centi, milli, kilo
b)
milli, centi, kilo
c)
kilo, milli, centi
d)
kilo, centi, milli
60.
A sample of bismuth has a mass of 343 g and a volume of 35.0 cm3.What is the density of bismuth?
a)
0.102 g/cm3
b)
9.80 g/cm3
c)
378 g/cm3
d)
1.20 104 g/cm3
61.
The number of significant figures in the measurement 170.040 km is
a)
Three
b)
Four
c)
Five
d)
Six
62.
The dimensions of rectangular solid are measured to be 2.0 cm, 3.0 cm, and 4.0 cm. The volume should be recorded as
a)
24 cm3.
b)
12 cm3.
c)
9 cm3.
d)
6 cm3.
63.
Expressed in scientific notation, 0.0930 m is
a)
93  X  10-3 m
b)
9.3  X 10-3 m.
c)
9.30 X  10-2 m.
d)
9.30 X 10-4 m.
64.
When 2.02 X 1023 is multiplied by 3.1 X 10-31, the product is
a)
6.3 X 10-8
b)
6.3 X 108
c)
6.3 X 1054
d)
6.3 X 10-54
65.

When an atom gains a valence electron, it becomes a(n) _____________ ion.

a)

positive

b)

negative

c)

neutral

66.

When an atom loses a valence electron, it becomes a(n) _____________ ion.

a)

positive

b)

negative

c)

neutral

67.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
68.
Where are the nonmetals located on the periodic table? 
a)
Blue
b)
Red
c)
Green
69.
What charge will an Oxygen ion have? 
a)
+1
b)
-1
c)
+2
d)
-2
70.
If an element has 3 valence electrons, what charge will likely form on its ion ?
a)
+3
b)
+5
c)
-3
d)
-5
71.
charge of lithium ion
a)
-2
b)
-1
c)
+1
d)
+2
72.
Anions are...
a)
Positive
b)
Negative
c)
Neutral
d)
Crying
73.
What is the ionic symbol for a Gold ion?
a)
Au+
b)
Au-
c)
Au+2
d)
Au-2
74.

What element does the chemical symbol Sn stand for

a)

Antimony

b)

Seaborgium

c)

Strontium

d)

Tin

75.

What is the chemical symbol for Potassium?

a)

P

b)

K

c)

Po

d)

Pt

76.

What element has the chemical symbol Au?

a)

Silver

b)

Lead

c)

Gold

d)

Actinium

77.
What is the chemical symbol for mercury?
a)
Hg
b)
Mc
c)
My
d)
C
78.

Who first developed the periodic table?

a)

Newton

b)

Einstein

c)

Mendeleev

d)

Rutherfor

79.

Which element had the original name 'plumbum"?

a)

Lead

b)

Platinium

c)

Plutonium

d)

Uranium

80.

Which of the following is NOT a noble gas?

a)

Helium

b)

Xenon

c)

Oxygen

d)

Neon

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