What are two names for the columns in the periodic table?
Groups, families
100
How would you separate a mixture of sand and iron particles?
Use a magnet to separate them.
100
You cut up a piece of chicken into small pieces. Is this a physical change or a chemical change?
Physical
100
What type of particle is all matter made up of?
Atoms
200
In which state of matter are the particles of most substances closest together? In which state of matter are the particles of most substances farthest apart?
The particles of most substances are closest together in the solid state and farthest apart in the gaseous state.
200
On which side of the periodic table are metals located? On which side are nonmetals located?
Metals are located on the left side of the periodic table, while nonmetals are located on the right side.
200
A beaker contains table salt dissolved in water. How could you separate the salt from the solution?
Let the water evaporate; boil the water
200
You light a match. Is this a physical change or a chemical change?
Chemical change
200
Whenever energy changes forms, some is lost as __________.
Heat
300
What is the phase change from a gas to a liquid called?
Condensation
300
Where is the atomic number found in each box on the periodic table?
At the top of the box, above the element symbol
300
Look at the solubility curve of ammonium chloride, NH4Cl. Describe the relationship between water temperature and the solubility of NH4Cl.
As water temperature increases, the solubility of ammonium chloride increases.
300
Name one physical property and one chemical property of a piece of paper.
Answers will vary.
300
As heat energy is added to water, what happens to the motion of the molecules in the water?
The motion of the molecules increases as heat energy is added.
400
In which state of matter do particles move fastest? In which state of matter do particles move slowest?
Particles move fastest in the gaseous state and slowest in the solid state.
400
In which group are the noble gases found?
Group 18
400
You pour some Kool-Aid mix into a glass filled with water. In the resulting solution, what is the solute and what is the solvent?
Kool-Aid is the solute. Water is the solvent.
400
You mix together water, eggs, flour, and sugar to form a cake batter. Is this a physical change or a chemical change?
Physical change
400
Look at the solubility curve for ammonium chloride, NH4Cl. How many grams of NH4Cl will dissolve in 100 grams of water at 70 degrees Celsius?
60 grams
500
During which of the following phase changes is heat energy absorbed by a substance? Choose all that apply.
a. Liquid to gas
b. Gas to solid
c. Liquid to solid
d. Solid to liquid
e. Gas to liquid
a. Liquid to gas
d. Solid to liquid
500
Name two elements that you would expect to have similar physical and chemical properties to sodium.
Lithium, potassium, rubidium, cesium, or francium
500
You place a sugar cube in a container of water. Describe two ways to make the sugar cube dissolve more quickly in the water.
Stir it; use a mortar and pestle to break it into smaller pieces; heat up the water
500
An ice cube melts when it is taken out of the freezer. Is this a physical change or a chemical change? Why?
This is a physical change because a new substance is not formed (both ice and liquid water are made up of H2O molecules).
500
What type of energy in gasoline is transformed into mechanical energy in a motorcycle engine?