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Worksheets2nd 9 weeks Physical Science Review Part 1
Total questions: 21
Worksheet time: 21mins
Name
Class
Date
1.
A proton has which of the following charges?
a)
negative
b)
neutral
c)
positive
d)
magnetic
2.
A student makes a drawing of a carbon atom. Which of these should the show in the nucleus of the atom?
a)
ions
b)
protons
c)
electrons
d)
molecules
3.
How is the modern model of an atom different from the Bohr atomic model?
a)
the masses of the atomic particles are different
b)
the number of electrons are different
c)
the shapes the nuclei are different
d)
the arrangement of the electrons are different
4.
In this atomic model, point A represent--
a)
a proton
b)
nucleus
c)
neutron
d)
electron
5.
How many electrons does Chlorine have in the element box?
a)
17
b)
25
c)
35
d)
0
6.
What is the symbol for Chlorine?
a)
C
b)
Cl
c)
Na
d)
Cu
7.
What makes chlorine different from all other elements?
a)
number of protons
b)
its presence in milk
c)
its presence in pool water
d)
atomic number
8.
Number of protons for the following element?
a)
35
b)
17
9.
Which element is an alkali metal?
a)
K
b)
Mg
c)
Al
d)
Ag
10.
Which has the greatest atomic mass?
a)
B
b)
C
c)
N
d)
Al
11.
Which of the following does not contain 3 atoms?
a)
O3
b)
H2
c)
H2O
d)
CO2
12.
Which of these minerals is a carbonate?
a)
Calcite CaCO2
b)
PhS
c)
CaSO4
d)
Fe2O4
13.
Using the periodic table above, which of the following would be a covalent bond?
a)
NO2
b)
NaCl
c)
Na2
d)
CaCl
14.
Which of these belongs in the outermost shell (energy level) of an atom?
a)
electrons
b)
protons
c)
neutrons
d)
photons
15.
An element from group 2 would mostly bond with an element from group?
a)
2
b)
13
c)
14
d)
16
16.
The process of splitting an atom's nucleus and releasing large amounts of energy is called
a)
nuclear fission
b)
nuclear fusion
c)
nuclear meltdown
d)
nuclear isotope
17.
All the following are advantages of nuclear power except
a)
less expensive to build and operate than coal burning power plants
b)
they produce no air pollution
c)
the produce more energy
d)
they do not contribute to global warning
18.
What is the main disadvantage of nuclear fission reactions to produce electrical energy?
a)
Radioactive waste that reactors produce are very dangerous
b)
the amount of money it costs to build a reactor
c)
communities feel that the are ugly
d)
reactors often meltdown and release radiation
19.
Which of the following is an example of an exothermic reaction?
a)
exploding fireworks
b)
baking a cake
c)
popping popcorn
d)
grilling chicken
20.
Calcium metal (Ca) can be produced by passing an electric current through molten Calcium Chloride (CaCl2). Chlorine gas (Cl2) is also formed. What is the balanced equation below?
a)
2CaCl ---> Ca + 2Cl
b)
CaCl2 + H2O --> Ca + ClH + O2
c)
CaCl2 + Cl --> Ca + Cl3
21.
In the chemical formula for ammonia NH3, what does the subscript 3 represent?
a)
The number of nitrogen and hydrogen atoms in each molecule of ammonia.
b)
The number of hydrogen atoms in each molecule of ammonia
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