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WorksheetsFirst 6 Weeks Review
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
A student is measuring the properties of a sample of ethanol. Which is an extensive property of the sample?
a)
mass
b)
color
c)
density
d)
boiling point
2.
Which statement describes a physical change?
a)
An iron bolt on a bridge rusts and weakens the bridge.
b)
A piece of paper burns when lit with a match.
c)
A balloon artist twists a long balloon into a shape of an animal.
d)
Slivers of magnesium in fireworks form a bright glow as they burn.
3.
In which two groups are mixtures classified?
a)
Heterogeneous and homogeneous
b)
Solid and liquid
c)
Liquid and gaseous
d)
Elements and compounds
4.
Which set is an example of an element, a compound, and a mixture?
a)
Carbon, oxygen, carbon dioxide
b)
Pure water, river water, sea water
c)
. Oxygen, Earth's atmosphere, orange juice
d)
Nitrogen, table sugar, cough syrup
5.
Which is the main difference between physical changes and chemical changes?
a)
A physical change forms one or more new substances but a chemical change does not.
b)
A chemical change forms one or more new substances but a physical change does not.
c)
Substances change state of matter only by undergoing physical changes, not chemical changes.
d)
None of the answers listed
6.
Which of the following is a physical change?
a)
corrosion
b)
explosion
c)
evaporation
d)
rotting of food
7.
Which of the following can be classified as a mixture?
a)
pure water
b)
pure air
c)
pure nitrogen
d)
pure gold
8.
What is average atomic mass of Bromine if 9.6% exists as 79Br and 90.4% exists as 80Br ?
a)
79.04 g
b)
79.54
c)
79.14
d)
79.90
9.
Which type of radioactive decay has the fastest, most energetic radiation?
a)
alpha
b)
beta
c)
gamma
10.
What is the missing product in the above nuclear reaction?
a)
230Ra
b)
238Ra
c)
230U
d)
238U
11.
Identify the missing product in the above reaction.
a)
220Th
b)
218Rn
c)
220Rn
d)
224Ra
12.
Identify the missing product
a)
83Br
b)
83Kr
c)
82Rb
d)
82Kr
13.
The process in which a heavy nucleus splits into two smaller more stable nuclei is called:
a)
nuclear fusion
b)
nuclear fission
c)
alpha decay
d)
beta decay
14.
A certain element has 28 protons, 28 electrons and 30 neutrons. Its mass number is?
a)
58
b)
56
c)
28
d)
30
15.
Which isotope has the most neutrons?
a)
carbon-12
b)
oxygen-15
c)
nitrogen-15
d)
carbon-13
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