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Midterm review
What is the shape of the p orbital?
The main group elements are in the
Midterm review
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Modern Chemistry chapters 1-6
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Answers
1
The main group elements are in the
p block
f block
d block
s block
2
What is the shape of the p orbital?
dumbbell
flower
sphere
doughnut
3
Electromagnetic radiation is released when
electrons return to the ground state from the excited state
electrons sit in the excited state
electrons jump in energy
electrons gain mass
4
What is the mass of 2.00 moles of oxygen?
16.0g
32.0g
4.00g
8.00g
5
0.02565 rounded to three significant figures would be:
0.0256
0.03
0.026
0.0257
6
What shape has three atoms bonded to the central atom with no lone pairs of electrons?
Bent
Trigonal planar
Tetrahedral
Trigonal pyramidal
7
How has Dalton been proven incorrect?
Atoms can be split into subatomic particles
Atoms can be destroyed
Atoms of different elements have the same mass
8
Rutherford discovered the
electron
neutron
proton
nucleus
9
An element that has the configuration [Xe] 6s
2
4f
14
5d
1
is in period
5
6
3
4
10
Which ionization energy is the largest?
3
1
4
2
11
A K compound emits violet at 766 nm. What is the frequency? (c=λν; light speed = 3.00x10
8
m/s)
2.55 x 10-6 Herz
3.92 x 1014 Herz
230. Herz
392,000 Herz
12
Which element is not a transition metal?
Tungsten
Silver
Magnesium
Gold
13
The horizontal rows of the periodic table are called
Columns
Periods
Groups
Families
14
How many neutrons are present in carbon-13?
4
12
6
7
15
The law that says mass cannot be created or destroyed is the:
Law of gravity
Law of definite proportions
Law of multiple proportions
Law of conservation of matter
16
In what group would you find an element with the configuration [ ] 6s
2
4f
14
5d
7
?
7
23
6
9
17
What is the density of a substance with a mass of 12g and a volume of 6 mL?
12 g/mL
2
2 g/mL
48
18
How many significant figures are in the answer when 3.00 is multiplied by 2.0?
5
3
2
6
19
What is the atomic number of the element with the noble gas configuration [Kr] 5s
2
4d
2
?
40
38
36
42
20
Which is an example of a homeogeneous mixture?
Blood
Salt water
Lucky charms
Trail mix
21
10
-6
is equivalent to
1 millimeter
1 Megameter
1 nanometer
1 micrometer
22
Written in standard scientific notation, 0.002160 would be:
2.160 x 103
2.16 x 10-3
2.160 x 10-3
21.60 x 10-4
23
We are using calcium for a project, but we are running out. What would be a good substitute?
Scandium
Magnesium
Potassium
Nitrogen
24
This rule says no two electrons can have the same set of four quantum numbers.
Pauli Exclusion principle
Aufbau principle
Hund's rule
Avogadro's rule
25
How many electrons are present in an atom that has the configuration 1s
2
2s
2
2p
6
3s
2
?
10
2
8
12
26
An object with a density of 3.692 kg/m
3
has a mass of 7.55 kg. What is its volume?
2.04 m3
27.87 m3
2.045 m3
.489 m3
27
The electromagnetic spectrum includes
visible light
microwaves
radiowaves
UV rays
28
Mendeleev organized the elements by their
properties
symbols
atomic numbers
charges
29
What is 10
-3
divided by 10
-5
?
102
10-8
10-1
10-2
30
Down a group, atomic radii generally
increase, then decrease
decrease, then increase
decrease
increase
31
What is NOT a property of metals?
Malleability
Brittle at room temperature
Ductile
Good conductor
32
How many atoms are in one mole of nickel?
58.69
6.02 x 1023
10
28
33
I will do my absolute best on the test.
False
True
34
An isotope of iron is 15.0% iron-55 and 85.0% iron-56. What is its average atomic mass?
55.45 amu
55.50 amu
47.60 amu
55.85 amu
35
Which of these is in order from biggest to smallest?
Kilo, hecto, centi, milli
kilo, centi, milli, hecto
centi, kilo, hecto, milli
Milli, centi, hecto, kilo
36
What is the charge of the nucleus?
Neutral
Positive
Negative
37
Which branch of chemistry deals with carbon-containing compounds?
organic chemistry
biochemistry
analytical chemistry
theoretical chemistry
38
Thomson's experiments with the cathode ray tube told us
electrons have mass
electrons are positive
electrons sit in clouds
electrons have a negative charge
39
What is the molar mass of manganese?
54.94 g/mol
12 g/mol
25 g/mol
24.31 g/mol
40
The SI base unit for temperature is
Kelvin
Celsius
Fahrenheit
41
What is the name of the group 17 elements?
Noble gases
Chalcogens
Alkali metals
Halogens
42
What shape has two atoms and two pairs of lone electrons on the central atom?
bent
trigonal planar
tetrahedral
linear
43
Which of the following is an example of a chemical change?
water evaporating
Paper tearing
salt dissolving in water
Silver tarnishing
44
The man responsible for the periodic law was
Cannizzaro
Moseley
Mendeleev
Bohr
