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WorksheetsPhysical Science Final Exam Review Chemistry
Total questions: 40
Worksheet time: 20mins
What was Niels Bohr's prediction about the location of the electrons in an atom?
Electrons orbit the nucleus in well-defined energy levels or orbitals.
Electron are scattered randomly in a positive background matrix.
Electrons can be found at various levels within an energy cloud surrounding the nucleus.
Electrons pair with protons and sta in the nucleus of the atoms.
Which best describes the current model of an atom?
a solid sphere unique for everything that exists
a central nucleus containing protons with electrons orbiting in specific paths
a solid sphere with electrons and protons embedded
a central nucleus containing protons and neutrons with electrons orbiting in levels of high probability.
An atom with which atomic diagram has chemical properties most similar to calcium?
A
B
C
D
Which distinguishes an atom of one element from an atom of a different element?
the number of protons
the number of electrons
the number of neutrons and protons
the number of neutrons
How many protons are in an atom of bromine?
45
35
115
80
A element with an atomic number of 51 and an atomic mass of 121 has how many neutrons in each atom?
51
172
70
121
Which diagram represents an electrically neutral atom?
A
B
C
D
What is the mass number in atomic mass units of an atom with 14 protons, 14 electrons, and 16 neutrons?
16 amu
14 amu
44 amu
30 amu
What is the atomic number of carbon-14?
7
12
6
14
Atomic masses are usually expressed as averages due to the existence of what phenomenon?
isotopes
radioactive decay
man-made elements
electrons
How do the atoms of carbon-12 and carbon-14 differ?
atomic number
number of neutrons
number of electrons
number of protons
Chlorine has two naturally occurring isotopes, chlorine-35 and chlorine-37. The atomic mass of naturally occurring chlorine is 35.45. Which statement is correct?
Chlorine-37 is more abundant.
Chlorine-35 is more abundant.
Chlorine-35 and chlorine-37 are equally abundant.
Chlorine-36 is more abundant.
This diagram shows a marble with a mass of 3.8 g that was placed into 10mL of water. What is the density of the marble?
0.95 g/cm3
1.05 g/cm3
1.27 g/cm3
0.79 g/cm3
Several common metal are listed in the chart.
Assuming equal masses of each, a cube of which metal would have the greatest volume?
silver
iron
aluminum
lead
This diagram represents four different liquids that have been poured into a container and have separated.
Which liquid has the greatest density?
Liquid 1
Liquid 2
Liquid 3
Liquid 4
This chart represents the melting points and boiling points for four substances.
Which substance is a solid at -200°C?
Hydrogen
Oxygen
Nitrogen
Chlorine
Question 17
10 pts
A solid substance is heated at a uniform rate. This graph shows how the temperature of the substance changes as heat is added.
According to the energy diagram shown, the substance will boil at what temperature?
140°C
90°C
-60°C
-10°C
How are potassium atoms and calcium atoms similar?
Same oxidation number
same number of protons
same number of valence electrons
same number of energy levels
An element on the far left side of the periodic table will have what property?
a tendency to lose electrons when reacting
a tendency to gain electrons when reacting
a tendency to share electrons when reacting
a tendency to avoid reactions
Which elements would most likely react with Group 2 (2A) metals?
halogens
transition metals
alkali metals
noble gases
Which elements are in the same period?
lead and sodium
silver and tin
tin and lead
oxygen and helium
Which compound is formed when aluminum bonds with fluorine?
AlF
Al3F
AlF2
AlF3
Which pair of elements will most readily form a compound?
Li and Be
Li and F
Li and Ne
Li and B
Which compound is most likely formed using covalent bonds?
KBr
K2O
CaBr2
SiO2
A teacher demonstrates a decomposition reaction. Which would be a correct demonstration?
burning methane in the presence of oxygen to produce carbon dioxide and water
reacting iron with oxygen to produce iron(III)oxide
running an electrical current through water to produce hydrogen and water
burning magnesium in the presence of oxygen to produce magnesium oxide
Which equation represents a double replacement reaction?
C
A
B
D
A chemical reaction is represented by this equation.
What is a product of this chemical reaction?
O2
Fe2O3
F
FeO
Which is a correctly balanced chemical equation?
B
D
C
A
The reaction of CaO and water is exothermic. A student mixes the two chemicals in a test tube and touches the side to of the test tube. Which statement describes the student's observation?
The test tube becomes cold as heat is released.
The test tube becomes cold as heat is absorbed.
The test tube becomes hot as heat is released.
The test tube becomes hot as heat is absorbed.
Solutions of lead(II) nitrate and potassium dichromate are mixed. The solution turns cloudy and yellow. Solid yellow particles fall to the bottom of the beaker. Which statement best describes this reaction?
A precipitate formed.
The reaction is exothermic.
A gas formed.
The reaction is endothermic.
Which solute exhibits the least response to temperature change?
NH3
NH4Cl
HCl
KCl
In a experiment, a researcher collected the following information about a solution made from a certain food.
pH = 3
taste = sour
reactivity = reacts with metals
Based on the information, what best describes this solution?
salt
acid
base
neutral
This is a pH chart of common materials.
What substance is the most basic?
Cheese
Baking Soda
Bleach
Soda
Which action would most effectively slow down the dissolving of a sugar cube in water?
stirring the water
heating the water
crushing the sugar
cooling the water
Which substance in water will conduct electricity?
corn starch
vegetable oil
salt
sugar
The loss of an alpha particle has what effect on the atomic number and mass number of an atom?
Atomic number and mass number both decrease.
Atomic number decreases; mass number increases
Atomic number and mass number both increase.
Atomic number increases; mass number decreases
Which best contrasts nuclear fission and nuclear fusion?
fission: splitting of small nuclei
fusion: joining of large nuclei
fission: needs extremely low temperatures
fusion: needs slightly higher temperatures than fission
fission: splitting of large nuclei
fusion: joining of small nuclei
fission: joining of small nuclei
fusion: joining of large nuclei
Where is nuclear fusion found?
nuclear power plants
atomic bombs
the sun and stars
hydrogen bomb
If data is considered precise, then all of the data points are __________.
close to the true or accepted value
all very small numbers
all very large numbers
all close to each other
15 L = ________ mL
0.0015 mL
0.15 mL
1500 mL
15000 mL
