Balancing Act
Changes
Equations
Lab Review
Periodic Table
100
The first step students have been asked to take while counting atoms or balancing equations?
Check the chemical formula to see if it is written correctly
100
Type of change that is not easily undone?
What is a chemical change?
100
Number that is in front of a molecule and tells how many of that molecule.
What is a coefficient?
100
The gas that was produced to extinguish the candle flame.
What is CO2- carbon dioxide gas.
100
This tells you how many valence electrons an element has.
What is the group number?
200
The number that is in front of a molecule/compound and tells you how many molecules you have?
What is a coefficient?
200
Color, Gas, Light, Temperature, Odor, Precipitate are signs of what?
What are signs of chemical change?
200
Number that is small, to the right and below a chemical symbol that tells you how many atoms.
What is a subscript?
200
Sign of chemical change when yeast is mixed with hydrogen peroxide. (H2O2)
What is gas and heat?
200
This tells you how many energy shells an element has.
What is a period?
300
The number of atoms that must be on both sides of a balanced equation?
What is the same number of atoms?
300
Type of change that does not change chemical properties and is easily reversed.
What is a physical change?
300
An arrow that points from the reactants to the product.
What is a yield?
300
Sign of chemical change (yellow solid) that was produced by adding lead nitrate to potassium iodide
What is a precipitate?
300
This is how many valence electrons an energy shell wants.
What is 8 (The Octet Rule) ?
400
The law that tells me that matter is neither created nor destroyed.
What is The Law of Conservation of Mass
400
Result of chemical change that is a solid that forms and falls to the bottom.
What is a precipitate?
400
The left side of the equation that tells what goes in to the reaction.
What is the reactant?
400
Lab equipment that was used to measure temperature change.
What is a thermometer?
400
Stable gases that have full outer shells.
What are the Noble Gases?
500
The number you NEVER change when balancing an equation.
What is the subscript?
500
The subatomic particle that determines how an atom will bond.
What is a valence electron?
500
The right side of an equation that tells what new substance was made.
What is the product?
500
Magnesium + Oxygen gas yields Magnesium oxide- What type of reaction?
What is synthesis reaction?
500
Method for calculating the number of neutrons
Mass number - atomic number
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