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WorksheetsChemical Reactions End of Unit Review
Total questions: 20
Worksheet time: 10mins
Steam rising off of a hot tub is an example of....
Melting
Freezing
Evaporation/Vaporization
Condensation
Snow melting in the sun is an example of...
Deposition
Sublimation
Melting
Freezing
Dry ice forming fog at a concert
Sublimation
Deposition
Condensation
Liquidization
Dry ice fog accumulating on a penny in a solid form
Freezing
Melting
Deposition
Sublimation
What are groups in the periodic table?
Vertical rows
Horizontal Rows
Substances
Elements
What are periods in the periodic table?
Vertical rows
Horizontal Rows
Substances
Elements
What is an atomic number? (Select all that are correct)
How many protons are in an atom
The numbered order of the periodic table
How many atoms are in an element
How much an atom weighs
What is a mass number?
How heavy an atom is
How many atoms are in a substance
The amount of force required to throw an atom
The number of protons in an atom
True or false: Some reactants do not create a chemical reaction when mixed together.
True
False
True or False: Chemical reactions can happen with only one reactant
True
False
What is a molecule?
A skin lesion
Atoms on the periodic table
An epiphany
A group of atoms joined together in a specific way
True or False: Molecules are destroyed in a chemical reaction
True
False
What is the correct symbol for Sodium?
NA
na
nA
Na
Reactants are always on the ______ side of the reaction.
Left
Right
Products are always on the ______ side of the reaction.
Left
Right
The mass number of an unidentified element is 47.88 amu. How would the mass number be rounded to the nearest whole number?
50
48
49
47
The periodic table is arranged by:
Alphabetical order
Increasing atomic number
Chemical symbols
The year is was discovered
These are to the LEFT of the zig-zag and are: shiny, good conductors of electricity, and can be shaped
Metals
Nonmetals
Metalloids
Halogen gases
These are to the RIGHT of the zig-zag and are: dull, possibly invisible, and break easily
Metals
Nonmetals
Metalloids
Tryptophans
One whole side is on the zig-zag and these have characteristics of both metals and nonmetals
Metals
Nonmetals
Metalloids
Halogen gases
