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WorksheetsUnit 1 Cumulative Review
Total questions: 70
Worksheet time: 42mins
Which element is this?
Nickel
Neon
Sodium
Nitrogen
Name this element.
Argon
Chlorine
Aluminum
Boron
Name this element.
Neon
Magnesium
Sodium
Manganese
What is the atomic number of this atom?
2
4
6
8
What is this element?
Beryllium (atomic #4)
Boron (atomic #5)
Carbon (atomic #6)
Nitrogen (atomic #7)
Valence electrons are found on the outside shell of an atom. How many valence electrons?
2
3
4
5
Valence electrons are found on the outside shell of an atom. How many valence electrons?
2
3
4
5
Is the model correct? Why or why not?
It's correct.
Incorrect-wrong number of neutrons
Incorrect-wrong shells for electrons
Incorrect-wrong number of electrons
What is the atomic number of this element?
17
18
35
35.453
How many electrons can fit in the second electron shell?
2
6
8
10
Which is more: Number of neutrons in Fluorine or number of protons in Neon?
protons in Neon
neutrons in Fluorine
they are the same amount
Neon doesn't have protons
Which model is correct for Helium?
Atom A
Atom B
Atom C
None are correct
Which atom below best represents a neutral Beryllium atom?
In which mixture can you not see all of the parts?
homogeneous
heterogeneous
H2C3O4N5
What is the total number of atoms in this formula? H2O2
2
4
3
What is called a chemical reaction?
A change in which one or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.
A change in which two or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.
Which is an example of a chemical change?
Cutting paper
Digesting Food
Crumbling paper
Boiling water
Which of the following are examples of a Chemical Change?
Iron Rusting
Gas Burning
Breaking a glass
Boiling water
Burning Wood
Color change like in a drop of food coloring in water, is a _________ change.
physical
chemical
Determine whether the observation describes a physical or a chemical property of matter:
Gold does not tend to tarnish or interact with other substances.
Physical Property
Chemical Property
Boiling point of water is 100oC
physical property
chemical property
Silver is shiny
physical property
chemical property
Sugar is soluble (dissolves) in water.
physical property
chemical property
Which of the following is a Chemical Property?
solubility
flammability
viscosity
melting point
Which of the following is a Chemical Property?
viscosity
melting point
solubility
toxicity
Where on the periodic table can nonmetals be found?
Top
Bottom
Left
Right
To which group does this atom belong?
1
3
13
11
Transition from a liquid to a gas
Condensation
Freezing
Evaporation
Melting
What happens to molecules when their kinetic energy increases?
The molecules move slower
The molecules move faster
The molecules get heavier
It depends on the type of molecule
Three containers with the same amount of the same material are shown below. Which container has the substance with the highest amount of energy?
The container on the left
The middle container
The container on the right
All have an equal amount of energy
Three containers with the same amount of the same material are shown below. Which container has the substance with the lowest amount of energy?
The container on the left
The middle container
The container on the right
All have an equal amount of energy
The change of one state of matter to another is called
Osmosis
Phase Change
Matter
Energy
Change of a gas directly into a solid
Sublimation
Condensation
Evaporation
Deposition
Which of the models of a chemical reaction best represents the Law of Conservation of Mass?
A
B
C
D
A student heated a 10 gram sample of a chemical in an open container. A chemical reaction occurred, and the mass of the sample was measured again. The mass of the sample was found to be less than before the reaction. Which of the following best explains the decrease in mass of the sample?
The heat caused the chemical to become less dense.
The reaction gave off more heat than was added.
Some of the lighter particles were destroyed.
Some of the particles escaped as a gas formed.
A student dissolved 25 grams of salt into 1,000 grams of water. What should the mass of the saltwater mixture be?
975 grams
1,000 grams
1,025 grams
2,500 grams
How many atoms of aluminum are on each side of the following equation?
4Al + 3O2 --> 2Al2 O3
2
6
4
1
How many nitrogen atoms are present in the compound
KNO3
0
1
3
Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.
The mass of the products is always greater than the mass of the reactants.
The mass of the reactants is less than the mass of the products.
The mass of the reactants equals the mass of the products.
The mass of the reactants is greater than the mass of the products.
The Law of Conservation of Mass says that matter can neither be __________ or __________.
created; destroyed
recycled; renewed
subtracted; added
joined; separated
A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?
The powder DISSOLVED in the water
The water turned the COLOR yellow
The bag's TEMPERATURE changed
The STATE OF MATTER changed
A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?
Physical change
Chemical change
No change
Which observations prove a chemical change has occurred?
Dissolving and expected color change
Mixing and dissolving
State of matter change and boiling water bubbles
Unexpected color change and temperature change
All these models represent...
Elements
Homogenous Mixtures
Compounds
Heterogenous Mixtures
Does this equation follow the law of conservation of matter?
Yes, because the mass stays the same before and after the reaction.
Yes, because there are the same number of atoms before and after the reaction.
No, because the mass is different before and after the reaction.
No, because there are not the same number of atoms before and after the reaction.
Classify this model of atoms.
Element
Compound
Homogenous Mixture
Heterogenous Mixture
What do elements in the same group have in common?
They have the same number of valence electrons
They have the same number of electron shells
They have the same number of protons
They have the same atomic mass
Why can't we prove the Law of Conservation of Mass with the whoosh bottle demo?
The mass changes after the reaction
It is not a closed system, so measuring mass is inaccurate.
It is a closed system, but the mass will still change.
We can prove it by measuring mass in this demo.
Which elements are considered semiconductors?
Nonmetals
Metals
Metalloids
Which of the following is NOT a pure substance?
Nitrogen (N)
Silver (Ag)
Hydrogen Peroxide (H2O2)
Salt Water (NaCl + H2O)
As temperature increases....
Kinetic energy of atoms increases
Kinetic energy of atoms decreases
Spacing between atoms decreases
Which property of Potassium (K) is a chemical property?
Potassium is very conductive
Potassium is malleable
Potassium reacts with H2O
The melting point is 62.3 degrees Celsius
