Law of Conservation of Matter
Physical/
Chemical Changes
Physical Properties

Periodic Table
Chemicals
100
Matter cannot be created or destroyed. It can only change form.
What is the law of conservation of matter?
100
Melting ice is an example of what type of change?
What is a physical change?
100
Mass divided by volume.
What is the formula for density?
100
This number tells you the number of protons.
What is atomic number?
100
Name the two categories of chemicals.
What are the natural and synthetic chemicals?
200
Mass of __________ must equal the mass of _________.
What is reactants and products?
200
Boiling water is an example of what type of change?
What is physical change?
200
The amount of heat needed to raise one gram of a substance by 1 degree Celsius.
What is specific heat?
200
How many valence electrons(electrons in it's outer ring)does oxygen have?
What is 6 valence electrons?
200
Anything made up of matter is a _______.
What is a chemical?
300
4P + 5O2 --> 2P205 20g 40g ?
What is 60g?
300
Burning paper is an example of what type of change?
What is chemical change?
300
The temperature at which a solid changes state into a liquid.
What is melting point?
300
What is the formula for finding the number of neutrons?
What is round the atomic mass minus the atomic number?
300
Name one natural chemical and one synthetic chemical.
One chemical that is naturally accuring and one chemcial that is man made.
400
____H2 + O2 --> 2H20 When this equation is balanced, what will be the coefficient infront of the ____H2?
What is 2H2?
400
A rusting bike is an example of what type of change?
What is chemical change?
400
The temperature at which a substance changes from a liquid to a gas.
What is boiling point?
400
What are the three major categories of elements and where do you find them on the periodic table?
Metals are found left of the zigzag line, nonmetals are found to the right of the zigzag line, and metalloids are found on the zigzag line.
400
Being exposed to chemical pollutants in the air would be more dangerous if a person suffered from __________.
What is asthma?
500
You have 10g of wood. After burning the wood, you are left with 5g of ashes. What has happened to the rest of the rest of the wood?
What is 5g of gas?
500
What are the 4 clues of a chemical change?
What is color change, temperature change, gas formation, and formation of precipitate?
500
The amount of a substance that can be dissolved at a given temperature.
What is solubility?
500
How man energy shells(levels) does Na(sodium) have?
What is 3 energy shells(levels)?
500
A carcinogen is a toxin that causes __________.
What is cancer?
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