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Physical properties and changes
More properties
Elements and the Periodic Table
Chemical reactions
Periodic Table
100
This is the same as a substances melting point.
What is freezing point?
100
The property used to identify an element and determine if it is a pure substance.
What is Density?
100
Over 100 of these are found on the periodic table.
What is an element?
100
On the left side of a chemical equation you have these and on the right you have this.
What are reactants and products?
100
Found inside an element with positive charge. 
What is an Protons?
200
Melting butter is an example of this change
What is a physical change?
200
To determine the density of a sample of matter you must know these two quantities.
What is mass and volume?
200
These are two ways to draw the electrons of an element
What are Bohr diagrams and lewis structures?.
200
This is the number of atoms contained in the following equation C6 H12 O6
What is 24 atoms?
200
Elements in the same horizonal row. 
What are periods?
300
This property make metals suitable for use in electrical wiring.
What is ductility?
300
This is the temperature at which a solid turns into a liquid.
What is melting point?
300
The atomic number of a substance can tell us two things about the atomic structure of that element.
What is the number of protons and electrons?
300
A chemical reaction produces two new substances each weighting 25 grams. This is the total mass of the reactants.
What is 50 grams?
300
Non-reactive elements
What are Noble Gases?
400
Is when a liquid turns into a gas.
What is evaporation?
400
Burning, rotting, rusting, and the formation of precipitates are all examples or evidences of this kind of change/reaction.
What is a Chemical change/reaction?
400
These are two or more elements together, but not chemically bonded.
What are mixtures?
400
If the reactants contain 12 carbon atoms and 4 oxygen atoms, this must be true of the products.
What is the products must contain 12 carbon atoms and 4 oxygen atoms?
400

Makes up Atomic Mass.

What is number of protons and neutrons in the atom?

500
Is when a solid turns directly into a gas, and skips the liquid phase.
What is sublimation?
500
Bob tries to disprove this law by burning a log. He weighs the log before he burns it and it has a mass of 25 grams. After burning the log, he weighs the ashes and finds that they have a mass of 17 grams. Bob think that he has dissproved this law, but in reality the rest of the mass was given off as smoke.
What is The law of Conservation of Mass?
500
These are negativly charged and help determine how and what the element can bond with to make compounds. For an element to be stable it must have 8 of these in its outer shell.
What are valence electrons?
500
The following is evidence that a chemical reaction has taken place. (Need 3)
What is heat is given off, a solid is formed, a gas is given off,...
500
Cannot be changed when balancing a Chemical Equation
What is a subscript?