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Mid-Term Review
Mid-Term Review
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1
What is the formula for pentaphosphorus dioxide?
P2O5
P5O2
P4O3
PO2
2
Which one is a type of kinetic energy?
chemical
potential
gravitational
physical
3
Which of the following elements has 10 neutrons?
Oxygen
Nitrogen
Fluorine
Carbon
4
Which of the following is a property of a gas?
strong attraction between particles
particles move slow
definite shape
takes shape of the container
5
Chemistry is the study of the composition, structure, _________, and reactions of matter.
experiments
measurements
properties
formulas
6
Atoms of the same element with a different number of neutrons are called
ions
isomers
isotonic
isotopes
7
Which one is the
smallest
unit of measurement?
dg
Mg
cg
kg
8
To calculate the number of neutrons in an atom, subtract the atomic number from the __________.
number of protons
number of electrons
mass number
average atomic mass
9
Which of the following is not a
pure substance
?
table salt
sand
water
carbon dioxide
10
What is the independent variable?
Kept constant
What you change
Result from what you changed
Set aside for comparison
11
How many orbitals are in the p sublevel?
1
5
7
3
12
Which of the following is a heterogenous mixture?
brass
salad
salt water
kool-aid
13
The atoms of which element contain 19 electrons?
Fluorine
Magnesium
Potassium
Sodium
14
The atomic number tells you the number of ______ and ______ in an atom.
protons, photons
protons, electrons
neutrons, electrons
protons, neutrons
15
Round the following number to 3 significant figures: 1.2 dm.
1.20
01.2
1
12
16
What is the SI unit for length?
Kelvin
Meter
Gram
Yard
17
Which of the following will form an ionic compound?
N and O
C and O
S and Cl
Rb and O
18
How many periods are on the periodic table?
9
18
3
7
19
Which of the following has the greatest ionization energy?
Cl
K
F
P
20
This element is located in Group 2, Period 4.
Calcium
Beryllium
Carbon
Magnesium
21
How many significant figures are in 0.00323 kg?
3
6
4
5
22
Which was has the lowest frequency?
x-ray
microwave
infrared
gamma
23
Which of the following will form a covalent compound?
Mg and P
Na and Cl
Ca and N
N and O
24
How many significant figures are in 321.090 grams?
6
5
3
4
25
Which of the following has the smallest atomic radius?
Ra
Sr
Ca
Ba
26
How many significant figures are in 12,100 millimeters?
4
5
2
3
27
I have 5 dogs, 6 cats, 5 birds, and 4 hamsters. What is the percentage of dogs?
5%
20%
33%
25%
28
What is the SI unit for
mass
?
meter
liter
gram
pound
29
Which of the following is an exact number?
5 minute drive
102 grams
12 cows
3.1 feet tall
30
Which element has 14 protons?
Silicon
Boron
Helium
Aluminum
31
The smallest part of an element that still retains its properties is a
atom
all of the above
ion
molecule
32
A carbon atom that has 6 protons and 8 neutrons has a mass number of _____.
8
6
2
14
33
Which one is not part of the scientific method?
Observation
Hypothesis
Experiment
Law
34
The dense, centrally-located, positive center of the atom discovered by Rutherford is the ____.
proton shield
nucleus
nuclide
electron cloud
35
Which of the following has the longest wavelength?
microwave
radio
ultraviolet
gamma
36
How many groups are on the periodic table?
18
3
9
7
37
How many orbitals are in the
s
sublevel?
5
1
3
7
38
The chemical symbol for sodium is
So
NA
S
Na
39
Ca-41 has how many protons?
unknown
41
20
21
40
An isotope of oxygen with 7 neutrons would have a mass number of _____.
32
15
14
16
41
True or False: 1.0 L = 1 dm
3
False
True
42
What is the SI unit for
volume
?
gram
meter
gallon
liter
43
What is the control in an experiment?
What you changed
Kept constant
Result from what you changed
Set aside for comparison
44
Round the following number to two significant figures: 221.87 cm.
200
221
221.87
220
