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Chemistry Final Exam Review
Columns of the periodic table are known as ___.
Carbon tetrachloride, CCl4 molecule is ______.
Chemistry Final Exam Review
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1
Carbon tetrachloride, CCl
4
molecule is ______.
nonpolar
neither
polar
both
2
Columns of the periodic table are known as ___.
periods
groups
rows
similarities
3
What is Chuck Norris' favorite element?
surprise
helium
boron
argon
4
The atomic number of an element whose atoms have 10 protons, 11 neutrons & 10 electrons is ___
34
21
11
10
5
Express the following decimal form, 5620 meters, in scientific notation.
5.620 x 10-3 m
5620.000 m
5620 x 103 m
5.620 x 103 m
6
This symbol separates the reactants from products and means “to yield”.
+
-->
s
g
7
In an equation, the symbol for a substance in water solution is followed by
l
aq
g
s
8
The ions Ca
2+
and PO
4
3-
form a salt with the formula __________.
Ca3(PO4)2
Ca2(PO4)3
CaPO4
Ca2PO4
9
How many unshared pairs of electrons does the nitrogen atom in ammonia (NH3) possess?
2
1
none
3
10
Most elements are ___.
metals
nonmetals
gases
metalloids
11
How many dots are drawn around the Lewis Dot structure of chlorine?
2
3
5
7
12
Chemistry affects all of life because all living and nonliving things are made of matter.
Maybe
True
False
13
When the equation Fe
2
O
4
+ Al → Al
2
O
3
+ Fe is balanced what is the coefficient of Fe
4
6
3
9
14
How do isotopes of an element differ?
# of electrons
# of protons
# of neutrons
atomic number
15
When ice melts and becomes liquid water, it has undergone a ___.
physical property
chemical change
chemical property
physical change
16
Which is the ground state electron configuration for chlorine?
1s2 2s2 2p6 3s2 3p43d1
1s2 2s2 2p6 3s2 3p23d1
1s2 2s2 2p6 3s2 3p5
1s2 2s2 2p6 3s2 3p23d14s1
17
The reaction Pb(NO
3
)
2
(aq) + 2KI(aq) → PbI
2
(s) + 2KNO
3
(aq) is a
decomposition
synthesis
single replacement
double replacement
18
Molecules adjust their shapes to keep which of the following as far apart as possible?
pairs of valence electrons
the electrons closest to the nuclei
mobile electrons
inner shell electrons
19
Anions tend to have a ______ charge.
neutral
negative
positive
large
20
Which of the following materials cannot be broken down into a simpler form?
compound
element
mixture
solution
21
The unbalanced reaction C
7
H
16
+ O
2
→ CO
2
+ H
2
O is a ______ reaction.
double replacement
decomposition
synthesis
combustion
22
What is the correct name for the formula SiO
4
?
silicon trioxide
silicon tetroxide
sulfur tetroxide
monosilicon tetroxide
23
An electron in the highest energy of an element’s atoms is called a(n) ____ electron.
Valence
Octet
Balanced
Positive
24
What makes one element different from another?
# of neutrons
# of electrons
none of the above
# of protons
25
What is the formula for nitrogen trihydride?
NiH3
N3H
NH3
NHe3
26
_____ is the study of the composition of matter and the changes that matter undergoes.
biology
physics
anatomy
chemistry
27
A 25.0 g sample of a liquid has a volume of 10.0 mL. What is the density of the liquid?
2.5 g/mL
25 g/mL
250 g/mL
35g/mL
28
A substance that contains two or more elements chemically combined in a fixed proportion.
element
compound
diffusion
chemical equation
29
Which of the following elements is unreactive?
argon
hydrogen
sodium
chlorine
30
Which equation is NOT balanced?
H2 + H2 + O2 → H2O + H2O
2H2 + O2 → 2H2O
4H2 + 2O2 → 4H2O
2H2 + O2 → H2O
31
In order to balance a chemical equation, it may be necessary to adjust the
number of products
subscripts
formulas of the products
coefficients
32
What is the charge on the magnesium ion?
+2
+1
-1
-2
33
How many electrons are shared in a single covalent bond?
4
8
2
6
34
Why do atoms share electrons in covalent bonds?
to become ions and attract each other
to attain a noble gas configuration
to increase their atomic numbers
to become more polar
35
The equation, AX → A + X is the general equation for a ___ reaction
synthesis
single replacement
double replacement
decomposition
36
What is the name of the ionic compound formed from calcium and bromine?
calcium bromide
bromine calcide
calcium monobromide
calcium bromine
37
Cations tend to be _____.
nonmetals
metals
liquids
metalloids
38
The shape of a molecule that has 2 covalent single bonds and no lone pairs on the central atom
trigonal planer
tetrahedral
linear
bent
