Properties & Atoms
The properties of two samples will be different when…
A. They have the same number of atoms
B. The repeating groups of atoms are different
C. They are both solids
D. They have the same color
B. The repeating groups of atoms are different
Repeating groups of atoms explain…
A. The size of a substance
B. Why substances have different properties
C. The temperature outside
D. The color only
B. Why substances have different properties
A chemical reaction is when…
A. Atoms disappear
B. Substances change into new substances
C. Nothing changes
D. Only color changes
B. Substances change into new substances
Reactants are…
A. Ending substances
B. Starting substances
C. Gases only
D. Liquids only
B. Starting substances
Atoms are NOT…
A. Rearranged
B. Reused
C. Created or destroyed
D. Moved
C. Created or destroyed
Two samples have the same number of atoms but different arrangements. What is true?
A. They have the same properties
B. They are the same substance
C. They may have different properties
D. They must be liquids
C. They can have different properties (look different)
Having more repeating groups of atoms changes…
A. The type of substance
B. The amount of substance
C. The atoms themselves
D. The reaction
B. The amount of substance
After mixing substances in a sealed container…
A. Atoms leave the container
B. New substances form
C. Matter disappears
D. Only one product forms
B. New substances form
Products are…
A. Starting substances
B. Atoms
C. Ending substances
D. Energy
C. Ending substances
All atoms from reactants…
A. Disappear
B. Stay the same
C. Are found in the products
D. Turn into energy
C. Are found in the products
Two substances are both liquids. What can you conclude?
A. They have the same properties
B. They must be the same substance
C. They can still have different properties
D. They have the same atoms
C. They can still have different properties.
If two substances have identical repeating groups…
A. They are different substances
B. They must be gases
C. They are the same substance
D. They will react
C. They are the same substance
Correct diagrams of products must show…
A. New atoms
B. Fewer atoms
C. Atoms rearranged into new groups
D. No change
C. Atoms rearranged into new groups
When choosing the correct product diagram…
A. Atoms can disappear
B. Atoms must match and rearrange
C. New atoms can form
D. Only colors matter
B. Atoms must match and rearrange
Sealed container experiments show…
A. Matter is lost
B. Matter is created
C. Matter is conserved
D. Reactions stop
C. Matter is conserved
Two samples are both green gases. When will they have the same properties?
A. When they are both gases
B. When they are both green
C. When they have the same repeating groups of atoms
D. When they have the same amount
C. When they have the same repeating groups of atoms
If repeating groups have different numbers of atoms…
A. Properties will be the same
B. Properties will be different
C. Nothing changes
D. They become solids
B. Properties will be different
In the simulation scenarios, reactions often produce…
A. One substance
B. Two new substances
C. No substances
D. Only gases
B. Two new substances
If a product has new properties…
A. Nothing changed
B. It is the same substance
C. Atoms rearranged into new groups
D. Atoms disappeared
C. Atoms rearranged into new groups
Correct models must show…
A. New atoms forming
B. Same atoms before and after
C. Fewer atoms
D. Only one substance
B. Same atoms before and after
What determines the properties of a substance?
A. Its size
B. Its color
C. The type and number of atoms in repeating groups
D. Its location
C. The type and number of atoms in repeating groups
Substances are made of…
A. Only elements
B. Energy
C. Repeating groups of atoms
D. Liquids
C. Repeating groups of atoms
What always stays the same in a reaction?
A. Color
B. State of matter
C. Number and type of atoms
D. Temperature
C. Number and type of atoms
If a product is different from the reactant…
A. It is the same substance
B. It is a new substance
C. It has fewer atoms
D. It is not real
B. It is a new substance
Why must atom counts match before and after a reaction?
A. Because color stays the same
B. Because matter is conserved
C. Because reactions stop
D. Because substances disappear
B. Because matter is conserved