WorksheetsChemistry Review (8.5A-F)
Total questions: 11
Worksheet time: 12mins
Name
Class
Date
1.
2Mg + O2 --> 2MgO
In the equation above, how many atoms are in the oxygen molecule?
In the equation above, how many atoms are in the oxygen molecule?
a)
2
b)
0
c)
1
d)
3
2.
Which of the following follows the Law of Conservation of Mass?
a)
3H2O --> 3H2 + 3O2
b)
C2H4 + 3O2 --> 2CO2 + 2H2O
c)
C + 4H2 --> CH4
d)
2Na + Cl --> NaCl
3.
In order to perform an experiment, a chemist needs an element that has similar properties of potassium (K) but has a lower atomic mass. Which element should the chemist select for the experiment?
a)
Rubidium (Rb)
b)
Sodium (Na)
c)
Magnesium (Mg)
d)
Calcium (Ca)
4.
A neutral atom has 12 protons and an unspecified number of neutrons. What is the identity of the element?
a)
Magnesium
b)
Vanadium
c)
Sodium
d)
Titanium
5.
Which of the following equations demonstrates an actual chemical reaction that forms a new substance?
a)
Zn + 2HCl --> ZnCl2 + H2
b)
H2O + NaCl --> H2O
c)
Zn + Al + Cu --> Zn + Cu + Al
d)
C12H22O2 + H2O --> H2O + C12H22O2
6.
The table below shows the recorded observations of student investigations.
The results of which investigation indicate that the substances least likely reacted chemically
The results of which investigation indicate that the substances least likely reacted chemically
a)
1
b)
2
c)
3
d)
4
7.
Chemical Compounds
Substance = Chemical Formula
Glucose = C6H12O6
Methane = CH4
Ethanol = C2H5OH
Hydrogen Peroxide = H2O2
How many atoms of hydrogen are in Ethanol?
Substance = Chemical Formula
Glucose = C6H12O6
Methane = CH4
Ethanol = C2H5OH
Hydrogen Peroxide = H2O2
How many atoms of hydrogen are in Ethanol?
a)
0
b)
2
c)
5
d)
6
8.
Calculate the atomic mass of the atom represented above.
a)
11
b)
12
c)
23
d)
34
9.
What conclusion can you make about the elements shown above?
a)
Phosphorus has more valence electrons than nitrogen.
b)
Carbon has fewer protons in its nucleus than nitrogen.
c)
Phosphorus is more like silicon than it is like nitrogen.
d)
Aluminum is smaller than carbon.
10.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
11.
An atom has 10 protons and a mass of 18. It has __ neutrons
a)
10
b)
18
c)
28
d)
8
100 %
