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2020 Chemistry Semester 1 Review

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

1. What are the correct coefficients when this equation is balanced? Sb + O2 → Sb4O6

a)

1, 2, 10

b)

4, 3, 1

c)

4, 6, 1

d)

10, 5, 1

2.

Group 13 elements tend to acquire which charge when they form ions?

a)

+3

b)

-5

c)

+5

d)

-3

3.

Which is true of binary ionic compounds?

a)

They consist of only two atoms.

b)

They consist of atoms of only two elements.

c)

They contain two different anions

d)

They have bonds that share two valence electrons.

4.

Which type of reaction is SiO2 + 4HF → SiF4 + 2H2O?

a)

Syntheis

b)

Double Replacement

c)

Single Replacement

d)

Combustion

5.

Which is the correct name for the compound N2O4?

a)

tetranitrogen dioxide

b)

dinitrogen tetroxide

c)

dinitrogen quadoxide

d)

nitrogen oxide

6.

Identify the type of chemical reaction demonstrated by this equation:


2KClO3 → 2KCl + 3O2

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

7.

Which is the correct formula for the compound formed between beryllium and nitrogen?

a)

BeN

b)

Be3N

c)

Be3N2

d)

Be2N3

8.

Identify the type of reaction shown by this chemical equation:


2Al + 6HCl → 2AlCl3 + 3H2

a)

Single Replacement

b)

Double Replacement

c)

Synthesis

d)

Decomposition

9.

What are the correct coefficients when this chemical equation is balanced?

P4 + O2 → P2O5

a)

4,2,7

b)

1,1,1

c)

2,5,4

d)

1,5,2

10.

Which is the charge that results when oxygen becomes an ion?

a)

+2

b)

-3

c)

+3

d)

-2

11.

11. In this equation, which are the reactant(s)?

​

A B C

Mg(s) + O2(g) --> MgO(s)

a)

A only

b)

B only

c)

A+B

d)

C only

12.

Which is the correct name for the compound Na3P?

a)

sodium phosphide

b)

sodium phosphite

c)

sodium phosphate

d)

sodium (III) phosphide

13.

Which is a physical property of ionic compounds in their solid state?

a)

good conductor of electricity

b)

weak attractive forces between ions

c)

low boiling point

d)

high melting point

14.

Which type of chemical reaction would this be classified as:


C3H8 + 5O2 → 3CO2 + 4H2O

a)

synthesis

b)

double replacement

c)

combustion

d)

decomposition

15.

Which type of reaction is 4Al + 3O2 → 2Al2O3?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

16.

In a chemical equation, (aq) after one of the substances means that it is which of these?

a)

a solid formed from two ionic substances

b)

released as gas

c)

dissolved in water- Aqueous

d)

produced from nothing

17.

Which types of reactions are essentially opposites of one another?

a)

combustion and synthesis

b)

single replacement and double replacement

c)

synthesis and single replacement

d)

synthesis and decomposition

18.

Which is the correct formula for the compound dinitrogen monoxide?

a)

NO2

b)

(NO)2

c)

N2O1

d)

N2O

19.

Which type of chemical reaction is this an example of?


Fe2(SO4)3 + 6KOH → 3K2SO4 + 2Fe(OH)3

a)

Synthesis

b)

Double Replacement

c)

Single Replacement

d)

Combustion

20.

What are the correct coefficients when this equation is balanced? K + Br2 → KBr

a)

1,1,1

b)

1,2,1

c)

2,1,2

d)

2,1,1

21.

Which is the correct name for the compound N2O3?

a)

dinitro trioxide

b)

nitrogen (II) oxide (III)

c)

trinitrogen dioxide

d)

dinitrogen trioxide

22.

The reaction below shows an example of which type of reaction?


2Na(s) + Cl2(g) --> 2NaCl(s)

a)

combustion

b)

decomposition

c)

replacement

d)

synthesis

23.

How many total atoms are in 3Na2SO4?

a)

21

b)

10

c)

24

d)

18

24.

Which type of reaction can be recognized by the general pattern A+BX --> AX+B?

a)

combustion

b)

synthesis

c)

single replacement

d)

combustion

25.

Identify the period and group numbers of the element with the electron configuration. [Ne]3s23p4

a)

Period 2, Group 4

b)

Period 3, Group 4

c)

Period 3, Group 16

d)

Period 2, Group 16

26.

Which element is the most metallic?

a)

A

b)

B

c)

C

d)

D

27.

Which region contains the halogen family of elements?

a)

A

b)

B

c)

C

d)

D

28.

Which region contains the alkaline earth metal family of elements?

a)

A

b)

B

c)

C

d)

D

29.

Which group will have an electron configuration that ends in ns2?

a)

Alkali metals

b)

Alkaline Earth metals

c)

Halogens

d)

Actinides

30.

Which element has the electron configuration 1s22s22p63s23p64s23​d4?

a)

titanium (Ti)

b)

chromium (Cr)

c)

sulfur (S)

d)

selenium (Se)

31.

Which is the most important characteristic in determining an element’s chemical properties?

a)

the number of protons and neutrons in its nucleus

b)

which period it is found in

c)

the number of valence electrons it contains

d)

its outermost energy level

32.

Which region of the periodic table is referred to as the p-block on the diagram?

a)

A

b)

B

c)

C

d)

D

33.

Which region of the periodic table is referred to as the S-block on the diagram?

a)

A

b)

B

c)

C

d)

D

34.

Which metalloid is in the fourth period and the same group as Carbon?

a)

Silicon

b)

Tin

c)

Germanium

d)

Boron

35.

Which is the halogen that is in Period 5?

a)

bromine (Br)

b)

strontium (Sr)

c)

iodine (I)

d)

xenon (Xe)

36.

Which is the correct number of valence electrons in the element sulfur (S)?

a)

16

b)

6

c)

2

d)

4

37.

Which correctly describes elements in the same group?

a)

They have the same number of valence electrons.

b)

They have electrons in the same outermost energy level.

c)

They have the same atomic radius

d)

They must be in the same state of matter.

38.

Based on the table below, atoms of which element have the greatest number of valence electrons?

a)

LIthium

b)

Potassium

c)

They all have the same number of valence electrons.

d)

The table does not show numbers of valence electrons.

39.

Which is the correct electron configuration for the element molybdenum (Mo)?

a)

1s22s22p63s23p64s23d4

b)

1s22s22p63s23p64s23d104p65s6

c)

1s22s22p63s23p64s24d104p65s25d4

d)

1s22s22p63s23p64s23d104p65s24d4

40.

Based on the figure below, what do the elements of a group (family) have in common?

a)

They have the same atomic number.

b)

They have the same atomic mass.

c)

They have the same number of protons.

d)

They have the same number of valence electrons.

41.

What do scientists call a hypothesis supported by many experiments?

a)

hypothesis

b)

scientific theory

c)

existing knowledge

d)

scientific law

42.

Which of the following substances is an element?

a)

baking soda

b)

Iron

c)

salt

d)

sugar

43.

Which is the separation technique that relies on the filtering of large particles from a liquid of the parts of the mixture?

a)

Filtration

b)

Distillation

c)

Chromatography

d)

Crystallization

44.

What is the change of state in which a gas becomes a liquid?

a)

Sublimation

b)

Freezing

c)

Condensation

d)

Melting

45.

Which is the state of matter shown in this figure?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

46.

Which is an intensive physical property?

a)

color

b)

mass

c)

length

d)

volume

47.

Which is a chemical property of copper?

a)

has a boiling point of 2567 °C

b)

reacts in air to form a green layer

c)

has the symbol Cu

d)

is a solid at room temperature

48.

Which is NOT a chemical change?

a)

a piece of wood is burned

b)

an egg is cooked

c)

a bar of iron rusts

d)

ingredients for a cake are stirred together

49.

Which is an example of a homogeneous mixture?

a)

sand

b)

clean air

c)

vegetable soup

d)

fresh-squeezed orange juice

50.

Which is the type of separation technique being demonstrated in the figure?

a)

crystalization

b)

distillation

c)

filtration

d)

chromatography

51.

The box for an element from the periodic table is shown. Which is the atomic mass?

a)

A

b)

B

c)

C

d)

D

52.

The box for an element from the periodic table is shown. Which is the atomic number?

a)

A

b)

B

c)

C

d)

D

53.

The box for an element from the periodic table is shown. Which is the atomic symbol?

a)

A

b)

B

c)

C

d)

D

54.

The box for an element from the periodic table is shown. Which is the atomic name?

a)

A

b)

B

c)

C

d)

D

55.

Which scientist described a positively charged core (“nucleus”) in the middle of a lot of empty space?

a)

Chadwick

b)

Thomson

c)

Rutherford

d)

Bohr

56.

Which scientist described an atom made of a solid positively charged substance with electrons dispersed throughout it?

a)

Chadwick

b)

Thomson

c)

Rutherford

d)

Bohr

57.

Which scientist developed the model of the atom shown?

a)

Chadwick

b)

Thomson

c)

Rutherford

d)

Bohr

58.

Which scientist developed the model of the atom shown?

a)

Chadwick

b)

Thomson

c)

Rutherford

d)

Bohr

59.

Which has a charge of +1?

a)

Proton

b)

Atom

c)

Electron

d)

Neutron

60.

Which has a charge of -1?

a)

Proton

b)

Atom

c)

Electron

d)

Neutron

61.

Which has a charge of 0?

a)

Proton

b)

Atom

c)

Electron

d)

Neutron

62.

Which two are isotopes of one another?

a)

Atoms 1 & 2

b)

Atoms 2 & 3

c)

Atoms 1 & 3

d)

Atoms 1& 4

63.

Which two are have the same mass?

a)

Atoms 1 & 2

b)

Atoms 2 & 4

c)

Atoms 1 & 4

d)

Atoms 2 & 3

64.

What is the mass number of the atom shown?

a)

9

b)

19

c)

20

d)

21

65.

Which element does this atom represent?

a)

potassium

b)

neon

c)

flourine

d)

sodium

66.

Which is the correct symbol for this atom?

a)

119F

b)

2111F

c)

1811F

d)

219F

67.

Which element has 14 protons?

a)

Nitrogen

b)

Silicon

c)

Aluminum

d)

Sulfur

68.

According to the modern concept of the atom, which are located in the nucleus of an atom?

a)

electrons and protons

b)

protons only

c)

neutrons and electrons

d)

protons and neutrons

69.

Which diagram shows a wave with the highest frequency?

a)

A

b)

B

c)

C

d)

D

70.

Which diagram shows a wave with the longest wavelength?

a)

A

b)

B

c)

C

d)

D

71.

Which is the correct electron dot structure for the element fluorine (F)?

a)
b)
c)
d)
72.

In the laboratory, one should NEVER

a)

ask question

b)

know how to contact help

c)

wear safety goggles and a lab apron

d)

perform experiments without your teacher's permission

73.

Which is the formula for the compound sulfur hexachloride?

a)

S6Cl

b)

SCl6

c)

SCl5

d)

S2Cl3

74.

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

a)

decomposition

b)

double replacement

c)

synthesis

d)

combustion

75.

Which type of reaction is SiO2 + 4HF → SiF4 + 2H2O?

a)

synthesis

b)

double replacement

c)

single replacement

d)

combustion

76.

What is the correct formula for the compound formed between magnesium and the phosphate ion?

a)

MgPO4

b)

Mg3PO2

c)

MgP2O8

d)

Mg3(PO4)2

77.

Which is the correct name for the compound Ca(ClO2)2?

a)

calcium chloride

b)

calcium chloroxide

c)

calcium chlorite

d)

calcium chlorate

78.

Which is the correct name for the compound Na3P?

a)

sodium phosphide

b)

sodium phosphite

c)

sodium phosphate

d)

sodium (III) phosphide

79.

Which is the correct name for the compound (NH4)2SO4?

a)

nitrogen hydrogen sulfate

b)

nitrogen hydrosul

c)

ammonium (II) sulfate

d)

ammonium sulfate

80.

Which precaution should you take when you see this symbol?

a)

do not look directly at the experiment

b)

wear goggles if you are doing the experiment

c)

wear goggles if you are performing or observing the experiment

d)

watch the teacher carefully and follow what he or she does

81.
H2O, CH4, NaCl are all examples of chemical
a)
formulas
b)
properties
c)
changes
d)
bonds
82.
Flammability is an example of a 
a)
state of matter
b)
physical property
c)
chemical property
d)
chemical formula
83.
Which state of matter has a definite shape and volume?
a)
solid
b)
liquid
c)
gas
d)
plasma
84.
How many protons does an atom of Carbon have?
a)
6
b)
4
c)
12
d)
14
85.
Which group of elements on the periodic table has properties that include being brittle, dull and poor conductors?
a)
semimetals
b)
non metals
c)
alkali metals
d)
transition metals
86.
In the formula, MgCl2, what does the 2 tell you?
a)
Chlorine has 2 valence electrons
b)
Chlorine has a 2+ charge
c)
Chlorine has a 2- charge
d)
There are 2 Chlorine atoms
87.
Which of the following is a property of an ionic compound?
a)
low melting point
b)
low boiling point
c)
high melting point
d)
form hard, brittle crystals 
88.
Which of the following properties uniquely identifies every element?
a)
Number of valence electrons
b)
Phase at room temperature
c)
Number of protons
d)
Charge of the atom
89.
Which pair of elements have the same number of valence electrons?
a)
Lithium and Beryllium
b)
Magnesium and Sodium
c)
Lithium and Sodium
d)
Magnesium and Lithium
90.
Which element would have similar properties to Sulfur?
a)
Nitrogen
b)
Oxygen
c)
Flourine
d)
Chlorine
91.
I which location on the Periodic Table are nonmetals found?
a)
Location 1
b)
Location 2
c)
Location 3
d)
Location 4
92.
According to the Law of Conservation of Mass,
a)
matter is always created in a chemical reaction.
b)
matter is always destroyed in a chemical reaction.
c)
matter is created and then destroyed in a chemical reaction
d)
matter is not created or destroyed in a chemical reaction.
93.

How many elements are in this Carbon dioxide molecule?

a)

3

b)

2

c)

1

d)

0

94.

How many elements are in this potassium chloride (KClO3) molecule?

a)

3

b)

4

c)

5

d)

6

95.

Which of the following are compounds?

a)

1, 2, 3

b)

2, 3, 4

c)

1, 4, 5

d)

3, 4, 5

96.

Which of the following are elements?

a)

2

b)

3

c)

3 and 4

d)

2 and 3

97.
How would you write 4.3756 x 104 in standard form?
a)
437,560,000
b)
0.00043756
c)
43,756
d)
4,3756
98.

How would you write 0.0005 in scientific notation?

a)

50 x 105

b)

5 x 10-4

c)

5 x 103

d)

.5 x 103

99.
In the atom diagram shown, E is pointing to
a)
An electron
b)
a proton
c)
a neutron
d)
the nucleus
100.

In this chemical equation, the elements in red are the_______.

a)

Products

b)

Reactants

c)

Subscripts

d)

Coefficients

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