WorksheetsChemistry Fall Semester Final
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
The invention of which of the instruments below had a significant impact on the development of the Big Bang Theory?
a)
telescope
b)
compass
c)
rocket
d)
space shuttle
2.
The most widely accepted theory as to how the universe began is called:
a)
The Big Crunch
b)
The Big Bang
c)
The James Webb
d)
The Expander
3.
Which of the following is NOT one of the three observations that support the big bang theory?
a)
Scientists have detected cosmic background radiation that is believed to be a direct remnant of the Big Bang theory.
b)
The Big Bang theory predicts that the universe should contain about 75% hydrogen and 25% helium and scientists have determined that is the actual abundance of these two elements.
c)
The size of the Milky Way Galaxy has been determined to be the approximate size that it would have been if the Big Bang theory explanation had occurred.
d)
Measurements of the light from stars show a shift to the red portion of the spectrum implying they are moving farther away from Earth. This shows the galaxy is expanding.
4.
What happens to a color of light as it moves farther away from the viewer of the light?
a)
It will not change at all.
b)
It shifts towards the red end of the spectrum
c)
It shifts towards the violet end of the spectrum
d)
It will depend on where it is coming from.
5.
An observation of the red shift of galaxies suggests that the universe is ______.
a)
contracting
b)
expanding
c)
at a steady state
d)
at equallibrium
6.
What is the approximate elemental composition of the universe?
a)
Equal amounts of all elements
b)
75% Hydrogen, 25% Helium
c)
67% Hydrogen, 33% Oxygen
d)
We don't know
7.
Naturally occuring elements other than hydrogen and helium are made in _____________.
a)
the earth's crust
b)
the moon
c)
a supernova
d)
a lab
8.
What does CMBR stand for?
a)
cosmic magnetic balanced radiation
b)
cosmic meteorite background radiation
c)
cosmic microwave background radiation
d)
cosmic magnetic boron radiation
9.
Which two statements below cause scientists to believe that CMBR is supportive of the Big Bang theory?
a)
CMBR is streaming to Earth from all directions equally.
b)
CMBR contains particles and dust from the first stars.
c)
CMBR is very hot which would be similar to the conditions during the Big Bang.
d)
CMBR is about 13.7 billion years old.
10.
What was the first element formed after the Big Bang?
a)
Hydrogen
b)
Carbon
c)
Nitrogen
d)
Oxygen
11.
Which element or elements below are formed during the supernova stage?
a)
heavy elements like gold and uranium
b)
helium
c)
carbon and neon
d)
hydrogen
12.
What is nuclear fusion?
a)
the splitting of a nucleus into smaller parts
b)
the recombining of two nuclei to form two different nuclei
c)
the changing of a proton into a neutron
d)
the union of atomic nuclei to form heavier nuclei
13.
What element is formed in all stars during the main sequence phase?
a)
Hydrogen
b)
Helium
c)
Carbon
d)
Iron
14.
Why are Hydrogen bombs (H-bombs) so much more powerful than traditional atomic bombs?
a)
H-bombs only use fission
b)
H-bombs only use fusion
c)
H-bombs use both fission and fusion
d)
H-bombs use TNT
15.
What is nuclear fission?
a)
The splitting of a nucleus into smaller parts
b)
The combining of two nuclei to form a larger nuclei
c)
The splitting up of a molecule by breaking bonds
d)
The changing of a proton into a neutron
16.
The diagram below represents a nuclear reaction in which a neutron bombards a heavy nucleus. Which type of reaction does the diagram illustrate?
a)
beta decay
b)
fusion
c)
fission
d)
alpha decay
17.
What is the best material to stop the most penetrating nuclear radiation?
a)
paper
b)
lead
c)
skin
d)
plastic
18.
Which of these is a beneficial use of radiation?
a)
Smoke detectors
b)
Magnetic Resonance Imaging (MRI) machines
c)
Radiotherapy to treat cancer
d)
All of the above
19.
What is the missing number in the image showing?
a)
234
b)
200
c)
238
d)
242
20.
What number is missing in this equation?
a)
37
b)
39
c)
38
d)
87
21.
Treshaun finds an unknown material. He observes that the material is dull and does not conduct electricity. How should this material be classified?
a)
metal
b)
nonmetal
c)
metalloid
d)
element
22.
Krypton (Kr) is not just Superman's home planet. It is a rare gaseous element found on the periodic table. How would Krypton (Kr) be classified?
a)
Halogen
b)
Noble Gas
c)
Inner Transition Metal
d)
Metalloid
23.
Uranium-235 (U-235) is a radioactive isotope of Uranium. How many protons and neutrons are in the nucleus of this atom?
a)
92 protons and 235 neutrons
b)
92 protons and 143 neutrons
c)
143 protons and 92 neutrons
d)
143 protons and 235 neutrons
24.
Which subatomic particle is small, negatively charged, and found on the outside of an atom?
a)
Proton
b)
Neutron
c)
Electron
d)
Isotope
25.
Which of the following elements would be the largest?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
26.
Is oxygen or sulfur larger? Why?
a)
Oxygen is larger because it has more protons to pull electrons in.
b)
Oxygen is larger because it has more energy levels with electrons.
c)
Sulfur is larger because it has more protons to pull electrons in.
d)
Sulfur is larger because it has more energy levels with electrons.
27.
Which list of elements is arranged in order of INCREASING atomic radius?
a)
Li, Na, Mg, Be
b)
Na, Mg, Be, Li
c)
Be, Li, Mg, Na
d)
Mg, Na, Be, Li
28.
Which of the following elements is found in period 6 on the Periodic table?
a)
Carbon (C)
b)
Chromium (Cr)
c)
Barium (Ba)
d)
Polonium (Po)
29.
Which of the following elements has the lowest ionization energy?
a)
Hydrogen
b)
Helium
c)
Francium
d)
Radon
30.
Which of the following element(s) have the 4 valence electrons? Hint: There might be more than one correct answer. Choose all that are correct.
a)
Potassium (K)
b)
Germanium (Ge)
c)
Silicon (Si)
d)
Titanium (Ti)
31.
What do the dots on the Lewis Dot structure represent? Choose the best answer.
a)
protons
b)
neutrons
c)
electrons
d)
valence electrons
32.
a)
A
b)
B
c)
C
d)
D
33.
What is the correct name for the anion shown below?
a)
sulfur
b)
sulfide
c)
sulfate
d)
selenide
34.
A cation is formed by a _______ that ________ electrons
a)
nonmetal, loses
b)
nonmetal, gains
c)
metal, loses
d)
metal, gains
35.
How many valence electrons will aluminum lose from its valence shell as it ionizes?
a)
1
b)
2
c)
3
d)
4
36.
An anion has a charge of -1. Which of these elements below would form this anion?
a)
copper
b)
chlorine
c)
cesium
d)
calcium
37.
An anion is _______ charged ion.
a)
positively
b)
negatively
c)
neutrally
38.
What will the charge on a selenide ion be?
a)
-1
b)
-2
c)
+2
d)
+1
39.
How many valence electrons will argon (Ar) gain or lose?
a)
It will lose one electron
b)
It will lose two electrons
c)
It will gain one electron
d)
Neither, argon is a noble gas and already has a full valence shell
40.
Which formula below would be the correct match between magnesium (Mg) and fluorine (F)?
a)
MgF2
b)
MgF
c)
Mg2F
d)
Mg2F3
41.
Which formula below would be the correct match between calcium (Ca) and sulfur (S)?
a)
CaS2
b)
CaS
c)
Ca2S
d)
Ca2S3
42.
Which formula below would be the correct match between barium (Ba) and phosphorus (P)?
a)
BaP2
b)
BaP
c)
Ba2P
d)
Ba3P2
43.
SrCl2 is often used as a red coloring agent in pyrotechnics (fireworks). It imparts a much more intense red color to the flames than most other alternatives.
What is the name of this compound?
a)
strontium chlorine
b)
sulfur chloride
c)
strontide chloride
d)
strontium chloride
44.
Major contributions of KI include use as a nutritional supplement in animal feeds and also the human diet. For the latter, it is the most common additive used to "iodize" table salt (a public health measure to prevent iodine deficiency in populations which get little seafood). What is the name of the compound KI?
a)
potassium iodide
b)
potasside iodide
c)
potassium iodine
d)
potash
45.
A covalent/molecular compound is formed from _______.
a)
two metals
b)
two nonmetals
c)
a metal and a nonmetal
d)
any combination of metal or nonmetal
46.
An ionic compound is formed from _______.
a)
two metals
b)
two nonmetals
c)
a metal and a nonmetal
d)
any combination of metal or nonmetal
47.
Which of the following is the correct structure for propene?
a)
a
b)
b
48.
Which of the structures shown is incorrect?
a)
a
b)
b
c)
c
d)
d
e)
e
49.
"Acid rain" is a broad term referring to a mixture of wet and dry deposition (deposited material) from the atmosphere containing higher than normal amounts of nitric and sulfuric acids.
In the United States, roughly 2/3 of all SO2 comes from electric power generation that relies on burning fossil fuels, like coal. Acid rain occurs when these gases react in the atmosphere with water, oxygen, and other chemicals to form various acidic compounds.
What is the chemical name of SO2?
a)
sulfur oxygen
b)
sulfur dioxide
c)
sulfur oxide
d)
monosulfur dioxide
50.
What is the name of the molecular compound N2H4?
a)
nitrogen hydride
b)
dinitrogen hydride
c)
dinitrogen tetrahydride
d)
nitrogen tetrahydride
100 %
