WorksheetsPhysical Science Final Exam Review
Total questions: 43
Worksheet time: 1hrs 26mins
How many protons, neutrons, and electrons are in a lithium atom?
3 protons, 3 electrons, and 4 neutrons
3 protons, 4 electrons, and 3 neutrons
3 protons, 3 electrons, and 3 neutrons
4 protons, 3 electrons, and 4 neutrons
Which element has chemical properties most similar to that of potassium (K)?
Ca
Na
C
Ba
In a covalent bond, electrons are...
shared
transferred
always split between two atoms
lost
In an ionic bond, electrons are...
shared
transferred
always split between two atoms
lost
Which of the following combinations will produce the largest current?
120 V and 12 Ohms
150 V and 10 Ohms
100 V and 25 Ohms
180 V and 90 Ohms
What is true for the chemical reaction shown?
It is balanced because the mass of the reactants is equal to the mass of the products.
It is unbalanced because the mass of the reactants is greater than the mass of the products.
It is unbalanced because the mass of the reactants is less than the mass of the products.
It is balanced because the number of reactants is equal to the number of products.
What coefficients will correctly balance the equation shown?
1, 2, 2
2, 2, 2
2, 3, 2
3, 2, 3
The half-life of Phosphorous-32 is 14.3 days. What fraction of a 100 g sample would be left after 42.9 days?
1/2
1/4
1/8
1/16
A saturated solution...
can accept additional solvent to be dissolved in the solute
can accept additional solute to be dissolved in the solvent
has the maximum amount of solvent that can be dissolved in the solute
has the maximum amount of solute that can be dissolved in the solvent
Which combination below will create the fastest chemical reaction?
a block of baking soda and vinegar at 20 degrees Celsius.
powdered baking soda and vinegar at 50 degrees Celsius.
a block of baking soda and vinegar at 50 degrees Celsius.
powdered baking soda and vinegar at 20 degrees Celsius.
In a fission reaction...
lighter nuclei combine to form heavier nuclei
heavier nuclei split to form lighter nuclei
energy is released resulting in unstable elements
energy is absorbed resulting in stable elements.
A series circuit has..
a single current path
multiple current paths
a greater voltage than current
a greater current than voltage
Based on the graph, how much NaNO3 dissolves at 10 degrees Celsius?
0 g
40 g
65 g
80 g
Acids are...
slippery
bitter
any pH higher than 7
able to turn litmus red
Which substance is the most basic?
bleach with a pH equal to 13.0
ocean water with a pH of 8.0
ammonia with a pH of 9
hydrochloric acid with a pH of 2
Jada made an electromagnet. Which choice below would NOT help make it stronger?
use an iron metal core
increase the current flowing through the wire
increase the number of coils of copper wire
change the direction of current flowing through the electromagnet
The reactivity of an atom is determined by
its number of valence electrons
the protons found in the outer shell
the number of protons and neutrons in a nucleus
the number of electrons and protons in its nucleus
A light bulb has a resistance of 9 ohms when it is attached to an 18V battery. What is the current in the circuit?
2 Amps
2 Volts
162 Amps
162 Volts
Nuclear waste from fission reactions has a very long half life. This is a ________________ of nuclear fission reactions.
advantage
disadvantage
A large amount of energy can be produced from the fission of a small amount of uranium. This is considered a __________________ of nuclear fission.
advantage
diadvantage
Ionic compounds have ____________ melting points and covalent compounds have __________ melting points.
higher; lower
lower; higher
equal; higher
lower; equal
What is the chemical formula for potassium nitride?
NK3
K3N
K2N
KN3
What is the chemical name for NaF?
monosodium fluoride
sodium fluorine
sodium fluoride
monosodium monofluoride
Metals...
have a low melting point
are poor conductors
are malleable
are soft
Why don't noble gases react?
They have 2 electrons in their outermost valence shell.
The outermost energy level of the noble gases is full.
They form positive cations
They form negative anions.
What coefficient would balance this equation?
C2H4O2 + _____ O2 2 CO2 + 2 H2O
1
2
3
4
If 30g of KCl is dissolved in 100mL of water at 60oC, the solution is...
saturated
unsaturated
supersaturated
neutralized
In the model shown, the current flowing through each bulb will _________________________ the current at point A?
be less than
be more than
remain the same as
double
In a motor an electromagnet...
changes electrical energy into kinetic energy
changes magnetic energy into electrical energy
increases the strength of the magnet around it
provides electrical energy required to run.
The elements pictured in the diagram are __________ because they contain a different number of neutrons and the same number of protons.
Ions
Isotopes
Cations
Balanced
A nucleus is unstable and radioactive if
it has too few protons for the small number of neutrons
it has too many neutrons for a large number of protons
it has too many valence electrons for a small number of neutrons
it has too many valence electrons for a large number of neutrons
What force holds the nucleus of an atom together?
strong force
electrical force
magnetic force
atomic force
In the graph shown, the half life of Iodine-131 is
1 day
2 days
8 days
16 days
Which is the correct Bohr model for Calcium?
Which of the reactions shown is a double replacement reaction?
A
B
C
None
In the parallel circuit shown, what happens if bulb A goes out?
B and C go out
B and C stay on
B stays on and C goes out
C stays on and B goes out
In an ionic bond...
metals bond with nonmetals
nonmetals bond with metals
nonmetals bond with nonmetals
metals bond with metals
Carbon dioxide (CO2) would be classified as...
a covalent bond
a metallic bond
an ionic bond
a bipolar compound
The equation shown in the diagram is...
a balanced alpha decay equation
a balanced beta decay equation
an unbalanced alpha decay equation
an unbalanced beta decay equation
The half-life of sodium-25 is 1 minute. How many grams of sodium-25 remain after 4 minutes if 10 grams is the initial amount?
0.625
1.25
2.5
5
How many grams of Fe are needed in the following chemical reaction to obey the Law of Conservation of Mass?
39.4
10.8
73.2
66.2
Which model is balanced according to the law of conservation of mass?
a
b
c
none
Which model shows a stable ionic compound for aluminum sulfide?
