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WorksheetsChemical Bonding DHS
Total questions: 37
Worksheet time: 30mins
Name
Class
Date
1.
Covalent compounds
a)
Share electrons
b)
transfer electrons
c)
contain a sea of electrons
d)
conduct electricity
2.
What happens when an atom loses an electron?
a)
Neutral (no charge)
b)
Positive charge
c)
Negative charge
3.
What happens when an atom gain an electron?
a)
Neutral(no charge)
b)
Positive charge
c)
Negative charge
4.
What charges attract?
a)
Opposite
b)
Same
5.
What charges repel?
a)
Same
b)
Opposite
6.
Predict the bond that will form between Be and F.
a)
Ionic
b)
Covalent
7.
Predict the bond that will form between Se and Cl.
a)
Ionic
b)
Covalent
8.
What is a valence electron?
a)
an electron that is found in the outermost shell of an atom.
b)
an electron found in the innermost shell of an atom.
c)
an electron found in the middle shell.
9.
What is the number of valence electrons for Oxygen?
a)
8
b)
6
c)
2
d)
1
10.
What is the number of valence electrons for Beryillum?
a)
1
b)
4
c)
2
d)
7
11.
What is the number of valence electrons for Silicon?
a)
1
b)
2
c)
6
d)
4
12.
What is the number of valence electrons for Neon?
a)
6
b)
7
c)
8
d)
9
13.
How many valence electrons in this structure?
a)
6
b)
5
c)
4
d)
7
14.
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
15.
Nitrogen will ____ electrons when forming an ionic bond.
a)
gain 1
b)
lose 1
c)
gain 3
d)
lose 3
16.
This could be the dot diagram of
a)
Mg
b)
Cl
c)
C
d)
O
17.
Why do ionic bonds form?
a)
so the number of protons equals the number of electrons
b)
to fill the outermost energy level
c)
so an atom can become unstable
18.
This is a correct dot diagram for nitrogen (N)
a)
true
b)
false
19.
This could be the dot diagram of
a)
Ne
b)
H
c)
C
d)
F
20.
This could be the dot diagram of
a)
Be
b)
B
c)
C
d)
Ne
21.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
22.
How many electrons should Sulfur have around its electron dot diagram?
a)
5
b)
6
c)
7
d)
8
23.
Ionic Bonding involves...
a)
The transfer of protons
b)
The transfer of nuetrons
c)
The transfer of electrons
d)
None Of the above
24.
Potassium and oxygen are going to form an ionic bond. How will this happen?
a)
Potassium will give electrons and oxygen will gain electrons
b)
Oxygen will give electrons and potassium will gain electrons
c)
Potassium and oxygen will share electrons
d)
They will create a sea of electrons
25.
When two atoms share electrons, a chemical bond is formed. This type of bond is called:
a)
covalent bond
b)
ionic bond
c)
crystal bond
d)
polyatomic bond
26.
What is a double bond?
a)
a bond between two atoms
b)
one pair of electrons shared between two atoms
c)
two pairs of electrons shared between two atoms
d)
James Bond's brother
27.
What type of compound consists of molecules that made of atoms that are covalently bonded?
a)
ionic
b)
crystal
c)
noncovalent
d)
molecular
28.
How many outer electrons does nitrogen have?
a)
3
b)
2
c)
5
d)
1
29.
How many outer electrons does hydrogen have?
a)
4
b)
3
c)
2
d)
1
30.
What type of bond shares electrons?
a)
Ionic Bond
b)
Covalent Bond
c)
Numerical Bond
d)
Metallic Bond
31.
How many electrons does #15 phosphorus need to gain to be stable?
a)
one
b)
two
c)
three
d)
four
32.
How many electrons are shared in a single covalent bond?
a)
2 pairs
b)
4
c)
2
d)
1
33.
How many electrons are shared in a triple bond?
a)
6
b)
3
c)
6 pairs
d)
5
34.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
35.
After drawing in your bonds, what do you do if you don't have enough electrons to get each atom to its octet?
a)
Place dots until everything has eight
b)
Place dots only around the terminal atoms
c)
Add a multiple bond
d)
Have eight only around the central atom
36.
How many outer electrons do most atoms need to be stable?
a)
1
b)
2
c)
6
d)
8
37.
Why do Hydrogen and Helium only need two valence electrons?
a)
The first electron shell can only hold two electrons.
b)
They are both metals.
c)
They both begin with H.
d)
They are both gases.
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