Density
d=m/v
What is the formula for density?
Substances present at the beginning of a chemical reaction
What are reactants
These particles orbit the nucleus of an atom
What are electrons?
Tells the number of protons in an atom
What is atomic number
ice melting
What is a physical change?
A measure of the amount of matter in an object
What is mass?
New substances created in a chemical reaction
What are products?
These particles make up nearly all the mass of an atom
Protons and neutrons
Atoms with similar properties are found in vertical columns called
What are groups?
candle burning
What is a chemical reaction?
A measure of the amount of space an object occupies
What is volume?
Instead of the = sign, chemical equations use this sign
What is yields?
Cannot be created or destroyed according to the Law of Conservation of Mass
Mass/matter
This family on the periodic table does not react with other substances
What are noble gases?
Glass breaking
What is a physical change?
A substance with lower density is placed in substance with greater density
What is float?
4CrO3 ----> 2Cr2O3 + 3O2
What is a balanced equation?
Two or more substances that combine chemically
What are compounds
These are the most reactive elements on the periodic table
What are alkali metals?
Mixing two solutions together to form a precipitate
What is a chemical change?
A liquid that is more dense than another will
What is sink?
H2 + O2 -----> 2H2O
What is an unbalanced equation?
States that mass cannot be created or destroyed. It can only change forms.
What is the Law of Conservation of Mass
Left side of the periodic table
What is where metals are found?
melting, boiling, freezing, evaporation, condensation
What are changes of state/phase changes?