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Physical properties and changes
More properties
Elements and the Periodic Table
Chemical reactions
Atoms and Conservation
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
The number of electrons is the same as this
The number of protons in a neutral atom
200
This type of reaction releases more heat/energy with the reforming of new bonds than is needed for the breaking of former bonds
What is Exothermic?
200
To determine the density of a sample of matter you must know these two quantities.
What is mass and volume?
200
The order in which the elements are arranged in the Periodic Table
What are Atomic Numbers
200
This is the number of atoms contained in the following equation C6 H12 O6
What is 24 different atoms?
200
This is the location at which all the neutrons and protons are located.
What is the nucleus of an atom?
300
This type of reaction requires more energy/heat to break initial bonds than is released in the forming of new bonds
What is Endothermic?
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 neutral element.
What is the number of protons and electrons?
300
A chemical reaction produces two new substances each weighing 25 grams. This is the total mass of the reactants.
What is 50 grams?
300
Smaller than proton or neutron and has a negative charge
What is an electron?
400
Baking soda when combined with vinegar creates this kind of reaction
Endothermic
400
Burning, rotting, rusting, and the formation of precipitates(solids) are all examples or evidences of this kind of change/reaction.
What is a Chemical change/reaction?
400
Is the word used to refer to the columns (Up and down) in the periodic table
What are families/groups?
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
Atoms are not created or destroyed in a chemical reaction
What is the Law of Conservation of Matter/Mass
500
This is the substance used in class to create the exothermic reaction when combined with water
Calcium Chloride
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
This particular kind of electrons 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.
What are valence electrons?
500
The following is evidence that a chemical reaction has taken place.
What is heat is given off, a solid is formed, a gas is given off,...
500
The products of a reaction are 8CO2 + 4H20, this many atoms are in the reactants
What is 36 atoms