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WorksheetsMidterm Review 21
Total questions: 31
Worksheet time: 24mins
Name
Class
Date
1.
What is the prefix for 7?
a)
penta-
b)
hepta-
c)
hexa-
d)
octa-
2.
If a mixture can not be separated, it is a
a)
homogeneous
b)
heterogeneous
c)
solution
d)
compound
3.
Water freezes at 0.0oC. This is a
a)
chemical property
b)
chemical change
c)
physical change
d)
physical property
4.
How many significant figures are in the following number? 0.0230 mL
a)
4
b)
3
c)
2
d)
1
5.
Salt is an example of a
a)
compound
b)
mixture
c)
element
d)
ion
6.
The dependent variable is placed on the x axis.
a)
True
b)
False
7.
∆ This symbol means a change in temperature.
a)
True
b)
False
8.
A compound is composed of two or more elements.
a)
True
b)
False
9.
An exothermic reaction turns hot.
a)
True
b)
False
10.
Which is the SI unit for energy?
a)
grams
b)
calorie
c)
kelvin
d)
joule
11.
Calculate the density of 30.0 g and 15.0 mL.
a)
2
b)
0.500
c)
2.00
d)
.5
12.
If the mass of an object increases then the volume will decrease.
a)
True
b)
False
13.
Find the energy to heat 60.0 g from 20.0 oC to 50.0 oC. The specific heat is 0.449 j/gxoC.
a)
0.337 J
b)
0.524 J
c)
1890 J
d)
1990 J
14.
Density and specific heat depend on mass.
a)
True
b)
False
15.
Who discovered the electron?
a)
Mendeleev
b)
Bohr
c)
Rutherford
d)
Thomson
16.
Which subatomic particle is the smallest?
a)
proton
b)
electron
c)
neutron
d)
nucleus
17.
Which particle does not carry a charge?
a)
neutron
b)
electron
c)
proton
d)
nucleus
18.
10 electrons and 11 neutrons. What is the mass number?
a)
11
b)
10
c)
11
d)
21
19.
First idea on the atom
a)
Chadwick
b)
Bohr
c)
Democritus
d)
Rutherford
20.
Which element is an alkaline metal?
a)
Mn
b)
Ca
c)
Na
d)
Cl
21.
Most elements are
a)
liquids
b)
plasma
c)
gases
d)
solids
22.
What is the name of group 8?
a)
Halogens
b)
Noble Gases
c)
Alkali
d)
Tranisitional
23.
Which particle is negative?
a)
neutron
b)
proton
c)
electron
d)
nucleus
24.
What is the oxidation number of fluorine?
a)
1-
b)
2-
c)
3-
d)
1+
25.
Which of the following is incorrect?
a)
LiCl
b)
CaOH2
c)
CuBr2
d)
Fe2O3
26.
What is the chemical formula for dichlorine pentoxide?
a)
Cl2O5
b)
Cl5O2
c)
ClO5
d)
ClO
27.
What is the name if CuCl2?
a)
copper chloride
b)
copper dichloride
c)
copper I chloride
d)
copper II chloride
28.
Which of the following is an example of a cation?
a)
S
b)
Cl
c)
Al
d)
O
29.
The Halogens are the least active elements on the Periodic Table.
a)
True
b)
False
30.
Which element does not belong in this group?
a)
Ar
b)
Kr
c)
He
d)
Na
31.
Which prefix means 100 times smaller?
a)
deci
b)
micro
c)
milli
d)
centi
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