WorksheetsModule 1 Review: Matter and Chemical Reactions
Total questions: 38
Worksheet time: 23mins
The atomic mass of an element is the total number of protons and___?
electrons
atomic number
neutrons
all of the above
Which of the following is not considered a phase change?
melting
burning
freezing
evaporation
Any change that results in the formation of new chemical substances is called a _______?
chemical change
physical change
product
reactant
A new material formed in a chemical reaction is called a ________?
atom
element
product
reactant
Metal melting is an example of a _________.
chemical change
physical change
Salt dissolving in water is an example of
chemical change
physical change
Paper burning is an example of
chemical change
physical change
The same substance is present before and after a
chemical change
physical change
What type(s) of change in matter cannot ever be reversed?
chemical change
physical change
both
neither
Which of the following is not a factor that impact chemical reactions?
amount of substances
color of substances
type of substances
temperature of substances
Chemical bonds that are broken______?
have no impact on thermal energy
absorb energy from the surrounding environment
release energy to the surrounding environment
all of these are possible
The energy in molecules has been stored in the
protons
bonds
electrons
neutrons
In order to build a chemical bond ___ are/is needed.
molecules
elements
protons
energy
Which of the following is an endothermic reaction?
burning wood
hot pack
photosynthesis
combustion
Which of the following is an exothermic reaction?
melting solid salts
burning sugar
photosynthesis
evaporating water
Which of the following is an endothermic reaction?
nuclear fission
baking bread
burning candle
freezing water into ice cubes
What happens to the surroundings during an exothermic reaction?
surroundings decrease in temperature
surroundings stay the same
surroundings increase in temperature
Which object is most dense?
x
y
z
Which object is least dense?
x
y
z
Which of the following is a chemical property?
Malleability
Density
Flammability
Color
Which of the following is not considered matter?
air
water
gravity
rock
The smallest unit of an element, which cannot be broken by any chemical means is called ________?
atom
element unit
compound
molecule
Look at this equation: 2 H2 + O2 --> 2 H2O. Is this a balanced equation ___ because____?
No, because there is no coefficient in front of the O2.
No, because there is an unequal number of oxygen atoms.
Yes, because each side of the equation has the same number of atoms.
Yes, because there is an unequal number of oxygen atoms.
A substance formed when two or more elements are bonded together?
atom
element unit
compound
molecule
Which letter is pointing to an electron?
A
B
C
D
E
The diagram represents a sodium atom bonding to a chlorine atom to form sodium chloride. Which statement is supported by this diagram?
Sodium chloride is an element.
Sodium chloride is a mixture.
Sodium chloride is a molecule.
Sodium chloride is composed of only one atom.
The equation below shows the products formed when a solution of silver nitrate (AgNO3) reacts with a solution of sodium chloride (NaCl).
AgNO3 + NaCl ---> NaNO3 + AgCl
(Reactants) (Products)
In this equation, the total mass of the reactants is _______.
greater than the total mass of the products.
less than the mass of AgCl.
equal to the mass of AgCl.
equal to the total mass of the products.
What statement best supports the representation of the model?
it is a compound because it has two bonds
it is a mixture because it has two gases
it is an element because it is water
it is a compound because it is made of two different atoms
Which letter represents the nucleus of the atom?
A
B
C
D
E
The Law of Conservation of Matter states ....
that matter cannot be created or destroyed
that energy cannot be created or destroyed
that matter can disappear
that matter can be created from nothing
What happens to the surroundings during an endothermic reaction?
It decreases in temperature
It increases in temperature
The temperature of the surroundings stays the same
Because of the law of conservation of matter products and reactants in chemical reactions must_______?
Have different number of atoms
Contain the exact same compounds
Be reversible
Have the same number of atoms
Which of the following statements is true?
the law of conservation of mass states matter can be created or destroyed in chemical reactions
atoms of a specific element can have different atomic masses
chemical reactions rearrange the atoms in the reactants to yield the products
during chemical reactions the number and types of atoms in the reactants is different than the number and types of atoms in the products
The _____of an element is the number of protons the element contains.
electrons
atomic number
neutrons
atomic mass
Materials that can be directly obtained or made from living things are called?
natural
synthetic
authentic
A _______material is one in which the starting substances are changed chemically to produce a material with different characteristics is called?
manufactured
natural
organic
synthetic
Which of the following statements is false?
Both synthetic and natural products are made from natural resources that can be changed by people from the form they were in when found in nature.
Synthetic vitamins are different in chemical structure than natural ones.
All synthetic products are made from natural resources.
When developing and manufacturing synthetic materials it is very important to consider all the impacts the process will have on society.
What determines the proprieties of a substance? Check all that apply.
atomic structure
molecular structure
color of the atoms
all of these
