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Chemistry revision

Total questions: 58

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

The negatively charged subatomic particles that are located in energy levels around the nucleus

a)

Protons

b)

Neutrons

c)

Electrons

d)

Ions

2.

Positively charged subatomic particles located in the nucleus of an atom

a)

protons

b)

neutrons

c)

electrons

d)

ions

3.

The neutral subatomic particles located in the nucleus of an atom

a)

protons

b)

neutrons

c)

electrons

d)

ions

4.

The outer most electrons of an atom

a)

valance electrons

b)

diatomic molecules

c)

bohr models

d)

isotopes

5.

Atoms tend to gain, lose, or share electrons in order to achieve a full outer energy level

a)

bohr model

b)

octet rule

c)

isotopes

d)

valance electrons

6.

Loss or gaining of an electron changes and atom into __________.

a)

isotopes

b)

valance electrons

c)

bohr models

d)

ions

7.

Is the number of protons in an element

a)

atomic mass

b)

atomic number

c)

valance protons

d)

diatomic molecules

8.

Is the protons plus the neutrons

a)

valance electrons

b)

atomic number

c)

atomic mass

d)

bohr diagram

9.

The first energy level of an atom can hold how many electrons?

a)

2

b)

8

c)

1

d)

22

10.

The second energy level of an atom can hold how many electrons?

a)

2

b)

8

c)

1

d)

22

11.

This could be the dot diagram of

a)

Mg

b)

Cl

c)

C

d)

O

12.

What is the goal of the Lewis Dot Structure?

a)

To determine the electron position.

b)

To show the element's valence electrons & bonding capabilities.

c)

To find the atomic mass of an element.

d)

To search for the number of electrons in an individual atom.

13.

How many valence electrons should Lithium have in its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

14.

How many valence electrons should Oxygen have in its Lewis dot model?

a)

5

b)

6

c)

7

d)

8

15.

How many valence electrons should Magnesium have in its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

16.

This is a correct dot diagram for nitrogen (N)

a)

true

b)

false

17.

This is a correct dot diagram for carbon (C)

a)

true

b)

false

18.

This is a correct dot diagram for neon (Ne)

a)

true

b)

false

19.
Which of these elements has 8 valence electrons?
a)
P
b)
Be
c)
O
d)
Ar
20.
What is the name of this element?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
21.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
22.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens
23.
How many valence electrons?
a)
2
b)
3
c)
5
d)
10
24.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
25.

On the periodic table, Groups are

a)

Horizontal rows

b)

Vertical columns

26.

On the periodic table, Periods are

a)

Horizontal rows

b)

Vertical columns

27.

How many valence electrons?

a)

2

b)

3

c)

4

d)

5

28.
Ions are: 
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
29.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
30.
When an atom gains a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
31.
If an element has 3 valence electrons, what charge will likely form on its ion ?  Hint:  It will lose those electrons.  What happens to the charge when it loses 3 electrons?
a)
+3
b)
+5
c)
-3
d)
-5
32.
Nitrogen will ____ valence electrons when forming an ionic bond.
a)
gain 1
b)
lose 1
c)
gain 3
d)
lose 3
33.
Ionic bonds form between two ions that have 
a)
ionic compounds
b)
negative charges
c)
positive charges
d)
opposite charges 
34.
Atoms are most stable when their outer shell is filled with electrons.
a)
true
b)
false
35.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
36.
Beryllium will ____ valence electrons when forming an ionic bond.
a)
lose 4
b)
gain 4
c)
lose 2
d)
gain 2
37.
Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?
a)
There are 2 bromide ions for every magnesium ion
b)
Bromide has a 2- charge
c)
Bromide has a 2+ charge
d)
There are 2 magnesium ions to every bromide ion
38.
Which is the correct name for CaBr2?
a)
Calcium Bromine
b)
Bromine Calcium
c)
Calcium Bromide
d)
Carbon and Bromine
39.

Which is the correct formula for aluminum sulfide?

a)

AlS

b)

Al3S2

c)

S3Al2

d)

Al2S3

40.
What is the formula for aluminum fluoride?
a)
AlF
b)
Al2F3
c)
AlF3
d)
Al3F2
41.
Metals tend to 
a)
gain electrons
b)
lose electrons
42.
What is the correct formula for the compound, lithium oxide?
a)
LiO
b)
Li2O
c)
LiO2
d)
Li2O2
43.

What is the charge of ion "X" in the formula XF3?

a)

+3

b)

-3

c)

+1

d)

-1

44.

Which of the following pairs of elements will NOT form an ionic compound?

a)

sodium and fluorine

b)

phosphorous and aluminum

c)

potassium and magnesium

d)

strontium and oxygen

45.

What is the name of group number 1?

a)

halogens

b)

noble gases

c)

alkali metals

d)

alkaline earth metals

46.

What is the name of group 2?

a)

transition metals

b)

halogens

c)

metaloids

d)

alkaline earth metals

47.

What group number are the halogens found?

a)

18 (8A)

b)

1

c)

2

d)

17 (7A)

48.

Which group is the most reactive?

a)

Alkali metals

b)

Halogens

c)

Noble gases

d)

Alkaline earth metals

49.

Which group is the least reactive?

a)

Alkali metals

b)

Halogens

c)

Nobel gases

d)

Alkaline earth metals

50.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
51.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
52.
Balance this equation...
H2 + Cl2 --> HCl
a)
It is balanced 
b)
3H2 + Cl2 --> 6H2Cl
c)
H2 + Cl2 --> 2HCl
d)
I don't know! Oh well.
53.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
54.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
55.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
56.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
57.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
58.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4

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