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WorksheetsBonding and Chemical Reactions
Total questions: 79
Worksheet time: 1hrs 18mins
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 the sodium atom loses an electron?
a)
It become negatively charged
b)
It become positively charged
c)
none
3.
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
4.
What charges attract?
a)
Opposite
b)
Same
5.
What elements generally make an ionic bond?
a)
metal and nonmetal
b)
2 or more nonmetals
c)
metal
d)
none of the above
6.
What elements generally make a covalent bond?
a)
metal and nonmetal
b)
2 or more nonmetals
c)
metal
d)
none of the above
7.
Predict the bond that will form between Be and F.
a)
Ionic
b)
Covalent
8.
Predict the bond that will form between Sr and S.
a)
Ionic
b)
Covalent
9.
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.
10.
What is the number of valence electrons for Oxygen?
a)
8
b)
6
c)
2
d)
1
11.
What is the number of valence electrons for Beryillum?
a)
1
b)
4
c)
2
d)
7
12.
What group would Ca like to join with
a)
5
b)
6
c)
7
d)
8
13.
If an atom loses two electrons what charge will it have?
a)
+ 2
b)
- 2
c)
+1
d)
-1
14.
If an atom loses two electrons what charge will it have?
a)
+ 2
b)
- 2
c)
+1
d)
-1
15.
Electrons are lost, gained, or shared to create chemical bonds.
a)
True
b)
False
16.
What is the smallest part of an element?
a)
compound
b)
atom
c)
element
d)
molecule
17.
Are the atoms more stable when they are bonded together or when they are apart?
a)
Bonded Together
b)
Apart
18.
Which type of bond has a transfer of an electron from on atom to another?
a)
Polar Covalent
b)
Non Polar Covalent
c)
Ionic
d)
Metallic
19.
Which type of element is likely to lose electrons?
a)
metal
b)
nonmetal
c)
metalloid
d)
anion
20.
What is the chemical name for the compound with the formula Na₂S?
a)
sodium sulfide
b)
sodium fluoride
c)
magnesium sulfide
d)
lithium oxide
21.
Which of the following has a full valence (outer) shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon
22.
CO2
a)
Ionic
b)
covalent
c)
polyatomic
23.
SIO2
a)
ionic
b)
covalent
c)
polyatomic
24.
An ionic bond forms when atoms ___________ electrons.
a)
gain
b)
share
c)
increase
d)
transfer
25.
What is a chemical reaction?
a)
a process of bonding substances together
b)
a process that leads to filled valence shells
c)
a process that releases or consumes energy
d)
all of the choices
26.
What is a chemical equation?
a)
a diatomic molecule
b)
a shorthand representation of a chemical bond
c)
a shorthand representation of a chemical reaction
d)
a substance
27.
What are substances on the left side of a chemical equation called?
a)
electrons
b)
groups
c)
products
d)
reactants
28.
What are substances on the right side of a chemical equation called?
a)
electrons
b)
groups
c)
products
d)
reactants
29.
What does the number in front of the molecular symbol mean?
a)
It shows that there is only one molecule present in a reaction
b)
It shows the number of molecules in the reaction
c)
It shows the number of reactions that took place
d)
All of the choices
30.
Can the subscripts in a chemical reaction be changed?
a)
Cannot be determined
b)
Maybe, depending on the energy released
c)
No, they define the molecules in the reaction
d)
Yes, to balance the equation
31.
When this equation (C3H8 + O2 -> CO2 + H2O ) is balanced, the coefficient in front of carbon dioxide is:
a)
1
b)
12
c)
3
d)
6
32.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
33.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
34.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
35.
An atoms overall charge is generally
a)
positive
b)
depends on its mood
c)
neutral
d)
negative
36.
Which of these is the electron?
a)
A
b)
B
c)
C
d)
D
37.
Which number here is my atomic number?
a)
5
b)
10.811
38.
How many Electrons
a)
2.5
b)
5
c)
6
d)
10.81
39.
In order for me to find the number of neutrons, I must round the atomic mass and then do what?
a)
atomic number-atomic mass
b)
atomic number x atomic mass
c)
atomic mass + atomic number
d)
atomic mass - atomic number
40.
Are the atoms more stable when they are bonded together or when they are apart?
a)
Bonded Together
b)
Apart
41.
Ionic Bonding involves...
a)
The transfer of protons
b)
The transfer of nuetrons
c)
The transfer of electrons
d)
None Of the above
42.
What do atoms that form positive ions tend to do?
a)
Tend to lose electrons
b)
Tend to lose protons
c)
Tend to gain electrons
d)
Tend to gain protons
43.
What is an ionic bond?
a)
When two ions are held to each other by attraction of between the opposite charges
b)
When ions seperate by force
c)
None of the above
44.
Isotopes are atoms of the same element with a different amount of
a)
protons
b)
neutrons
c)
electrons
d)
atoms
45.
Two or more atoms chemically joined are called...
a)
atoms
b)
ionics
c)
covalents
d)
compounds
46.
What is a reactant?
a)
The chemical substances on the left side or flat side of the arrow
b)
The chemical substances on the right side or pointed side of the arrow
47.
What is a product?
a)
The substances that come out of the chemical reaction.
b)
The beginning substacnes
48.
The substances that are present before a reaction are the...
a)
reactants
b)
products
c)
both of these
d)
neither of these
49.
In a chemical equation, the substances that are on the right side/ pointed side of the arrow are the...
a)
reactants
b)
products
c)
catalysts
d)
inhibitors
50.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
51.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
52.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
53.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction.
54.
What is the arrow in a chemical equation...
H2 + O --> H2O
H2 + O --> H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
55.
What is the little number after an element in a chemical equation called.
Example: H2
Example: H2
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
56.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
57.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
58.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
59.
Which side of a chemical equation is the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
60.
How many total F atoms are in this formula?
6MgF2
a)
2
b)
6
c)
8
d)
12
61.
When you combine potassium and bromide, which of the following represents the correct formula?
a)
BrK
b)
KBr2
c)
K2Br
d)
KBr
62.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
63.
What is an ion?
a)
A Charged Atom
b)
A Large Atom
c)
A Small Atom
d)
A Cute Atom
64.
Barium atoms want to form...
a)
an anion
b)
a cation
c)
an onion
d)
a cuddly kitten friend
65.
An Arsenic atom wants to form...
a)
An anion
b)
A cation
c)
An onion
d)
A cuddly kitten friend
66.
Why are ions formed?
a)
To make our lives difficult
b)
Because atoms want 8 valence electrons
c)
Because atoms have the same number of protons and electrons
d)
Because atoms gained neutrons
67.
Cations are...
a)
Positive
b)
Negative
c)
Neutral
d)
Purring
68.
Anions are...
a)
Positive
b)
Negative
c)
Neutral
d)
Crying
69.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
70.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
71.
A Silicon atom wants...
a)
3 more electrons
b)
3 less electrons
c)
4 more or less electrons
d)
2 more electrons
72.
Which particles change the charge in atoms when ions are formed?
a)
Protons
b)
Electrons
c)
Neutrons
d)
Kittens
73.
What is a Rubidium ion's symbol?
a)
Rb-
b)
Rb+
c)
Rb-2
d)
Rb+2
74.
What is the ionic symbol for a Gold ion?
a)
Au+
b)
Au-
c)
Au+2
d)
Au-2
75.
What is the ionic symbol for a phosphorus atom?
a)
P-3
b)
P+3
c)
P-2
d)
P+2
76.
What is the ionic symbol for a Tin atom?
a)
Sn+4 or Sn-4
b)
Sn-4
c)
Sn+3
d)
Sn-3
77.
What is the ionic symbol for Krypton?
a)
Kr
b)
Kr+
c)
Kr-
d)
Kr-2
78.
Where are the nonmetals located on the periodic table?
a)
Blue
b)
Red
c)
Green
79.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
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