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Worksheets2nd 9 Week Review Part 1
Total questions: 30
Worksheet time: 26mins
Which of the following is NOT a part of the Nuclear Model's view of the atom?
Electrons are found in a cloud around the nucleus.
The nucleus has a positive charge.
The nucleus is in the center of the atom.
Atoms are mostly empty space.
How is the electron cloud model of an atom different from the planetary model?
The numbers of electrons are different.
The arrangements of the electrons are different.
The shapes of the nuclei are different.
The masses of the atomic particles are different.
What distinguishes each element from all others, and gives it unique physical and chemical properties?
The number of protons
The electron configuration
The number of neutrons
The element’s universal origin
Which model is represented by discovery 2?
Nuclear Model
Planetary Model
Billiard Ball Model
Plum Pudding Model
Where is most of the mass of an atom located?
Evenly spread throughout the atom
Electron Cloud
In the nucleus
In the electron
If an atom temporarily gains or loses one or more neutrons, it is considered a/an ___.
isotope
ion
new element
metalloid
Which physical property is related to a change in the state of matter?
Boiling Point
Acidity
Combustibility
Basicity
Which student is conducting an experiment on the chemical properties of a substance?
The solubility of salt (NaCl) is measured in different amounts of water.
The odor of sulfur (S) is measured in different indoor environments.
The acidity of vinegar (C2H4O2) is measured daily for five days.
The melting point of silver (Ag) is measured at various elevations.
A sample of aluminum has a volume of 3.0cm3 and a mass of 8.1g. What is the density of aluminum?
24.3 g/cm3
0.37 g/cm3
5.1 g/cm3
2.7 g/cm3
What is an example of a substance undergoing a physical change?
Freezing water into ice cubes
Burning trash
Mixing baking soda (base) and vinegar (acid)
Rusting of an iron bike
A person combines the ingredients for a cake and then bakes the cake. While the cake is baking, they combine butter, sugar, and milk and mix them together to make the icing. What type of changes created the cake and the icing?
The icing is formed by a chemical change, and the cake is formed by a physical change.
The cake is formed by a chemical change, and the icing is formed by a physical change.
Both the icing and the cake are formed by chemical changes.
Both the icing and the cake are formed by physical changes.
A student added Epsom salt crystals to water in a test tube. He found that the test tube became colder. Which statement explains the reaction described? (Hint: It is using heat)
There is absorption of heat, so it is an endothermic reaction.
There is release of heat, so it is an exothermic reaction.
There is release of heat, so it is an endothermic reaction.
There is absorption of heat, so it is an exothermic reaction.
The subscript of oxygen in the product should be —
2
5
20
10
Using our knowledge on the Law of Conservation of Mass, what is the total mass of the reactants compared to the total mass of the products at the end of chemical reactions?
The mass of the product is doubled.
The mass of the product is half the mass of the reactants.
The mass is the same.
The mass changes depending on the reaction.
__ Al + __ HCl → __ H2 + __ AlCl3
Looking at the periodic table, what two inferences about lithium (Li) are true?
Lithium (Li) is a nonmetal, while aluminum (Al) is a metalloid.
Lithium (Li) has a larger atomic number than Beryllium (Be).
Lithium (Li) has 3 protons.
Lithium (Li) has the least amount of protons in its period.
What will occur when Magnesium (Mg) (group 2) forms a bond with Sulfur (S) (group 16)?
Magnesium (Mg) will share its two valence electrons to form a covalent bond.
Magnesium (Mg) will give away its two valence electrons to form an ionic bond.
Magnesium (Mg) will give away its two valence electrons to form a covalent bond.
Magnesium (Mg) will share its two valence electrons to form an ionic bond.
Which periodic table correctly shades the location of the nonmetals?
1
2
3
4
Which set of element pairs contains elements chemically similar to each other?
H and Be
N and F
He and Ca
Br and Cl
When energy changes form, some of the wasted energy is always changed into —
heat energy
chemical energy
mechanical energy
radiant energy
What kind of energy transformation takes place in this system?
light to chemical to electrical
chemical to electrical to light
electrical to light to chemical
electrical to chemical to light
Which of these affect a roller coaster car's potential energy at any given moment?
the car's mass and velocity
the car's density and velocity
the car's velocity and height above the ground
the car's mass and height above the ground
At which point does a roller-coaster have the greatest kinetic energy?
At the bottom of the tallest hill
At the top of the tallest hill
As it is climbing up the tallest hill
Kinetic energy never changes
Which of these descriptions of states of matter is not true?
A solid has a definite shape and a definite volume.
Plasma is made of ionized gas with free-floating electrons.
Gas assumes the shape and volume of its container.
A gas has a definite volume but no definite shape.
What change in states of matter is occurring at point B on the graph if thermal energy is decreasing?
Boiling/Vaporization
Melting
Freezing
Condensation
Which of these best describes the particle motion taking place as CO2 gas is exposed to freezing temperatures?
The particles move with more force.
The motion of the particles is unchanged.
The particles decrease in speed.
The motion of the particles becomes random.
The movement of air in this room is a great example of which heat transfer?
Radiation
Convection
Conduction
Induction
A camper heats a pot of water over a campfire, as shown. By which processes is the water in the pot being heated?
The campfire is directly heating the pot through conduction, and that heat is transferred from the pot to the water by radiation.
The campfire is directly heating the pot through radiation, and that heat is transferred from the pot to the water by conduction.
The campfire is directly heating the pot through convection, and that heat is transferred from the pot to the water by convection.
The campfire is directly heating the pot through radiation, and that heat is transferred from the pot to the water by convection.
Which term describes the total kinetic energy of particles in a substance?
Kelvin
Absolute
Heat
Temperature
