A characteristic that is observable without changing a substance chemically.
What is a physical property?
The smallest indivisible unit of an element that keeps its identity in a chemical reaction.
What is an atom?
Name the 3 formulas to find density, mass and volume.
D = M / V
M = V x D
V = M / D
Name the 3 states of matter.
Liquid
Gas
The following units are used for what?
grams
kilograms
ounces
Mass
A characteristic that is observable only by changing the substance chemically.
What is a chemical property?
Two or more atoms of the same OR different element bound together chemically.
What is a molecule?
Find the density of carbon dioxide gas if the mass is 0.196 grams and the volume is 100 mL.
0.00196 g/mL
Which element is represented by this atomic model?
Carbon
Why: the model has 6 protons, neutrons and electrons
Explain why the melting of candle wax is not a chemical change.
In this image, the girl is demonstrating which kind of change?
Physical change (cutting paper)
Two atoms of DIFFERENT elements bound together chemically.
What is a compound?
Find the mass of a sample of gasoline with a density of 14.5 g/mL and a volume of 250 mL.
3625 grams
Which kind of mixture is shown in the image?
Homogeneous: You CAN'T see all the components.
What is the name of the family/group that contains Fluorine, Chlorine, Bromine and Iodine?
Halogens / Halides
In this image, the person is demonstrating which kind of change and why?
Physical change (dissolving sugar in coffee does not change the coffee chemically)
Name the 3 subatomic particles and their charge.
Proton - Positive
Neutron - No charge
Electron - Negative
What is the volume of a block of metal that has a mass of 56.8 grams and a density of 1.45 grams per cubic centimeter?
39.17 cubic centimeters
Which kind of mixture is represented by the image?
Heterogeneous (you can see all the different components)
Which element makes up the majority of our air?
Nitrogen
Fruit rotting
Iron rusting
Metal tarnishing
Cooking or Baking something
Combustion (flame)
Fermentation
Name the location of each subatomic particle in an atom.
Proton - nucleus
Neutron - nucleus
Electron - cloud / shell
Which cube (the left cube or right cube) is more dense? Explain how you know.
The cube on the left is more dense because the mass is higher than the right cube but the volumes are the same.
Another name for a homogeneous mixture is....
Draw the atomic structure for Oxygen.