Back to the Basics
The Atoms Family
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Chemistry Matters
So Random
100
A characteristic that is observable without changing a substance chemically.
What is a physical property?
100
The smallest indivisible unit of an element that keeps its identity in a chemical reaction.
What is an atom?
100
Name the 3 formulas to find density, mass and volume.
D = M / V
M = V x D
V = M / D
100
Name the 3 states of matter.
Solid
Liquid
Gas
100
The following units are used for what?
grams
kilograms
ounces
Mass
200
A characteristic that is observable only by changing the substance chemically.
What is a chemical property?
200
Two or more atoms of the same OR different element bound together chemically.
What is a molecule?
200
Find the density of carbon dioxide gas if the mass is 0.196 grams and the volume is 100 mL.
0.00196 g/mL
200
Which element is represented by this atomic model?
Carbon
Why: the model has 6 protons, neutrons and electrons
200
Explain why the melting of candle wax is not a chemical change.
There is not a new product that is made.
300
In this image, the girl is demonstrating which kind of change?
Physical change (cutting paper)
300
Two atoms of DIFFERENT elements bound together chemically.
What is a compound?
300
Find the mass of a sample of gasoline with a density of 14.5 g/mL and a volume of 250 mL.
3625 grams
300
Which kind of mixture is shown in the image?
Homogeneous: You CAN'T see all the components.
300
What is the name of the family/group that contains Fluorine, Chlorine, Bromine and Iodine?
Halogens / Halides
400
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)
400
Name the 3 subatomic particles and their charge.
Proton - Positive
Neutron - No charge
Electron - Negative
400
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
400
Which kind of mixture is represented by the image?
Heterogeneous (you can see all the different components)
400
Which element makes up the majority of our air?
Nitrogen
500
Give 3 examples of chemical changes.
Fruit rotting
Iron rusting
Metal tarnishing
Cooking or Baking something
Combustion (flame)
Fermentation
500
Name the location of each subatomic particle in an atom.
Proton - nucleus
Neutron - nucleus
Electron - cloud / shell
500
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.
500
Another name for a homogeneous mixture is....
A solution
500
Draw the atomic structure for Oxygen.
