science 2
A combination of symbols that shows the ratio of elements in a compound
A combination of symbols that shows the ratio of elements in a compound
Chemical Formula
CO2, C6H12O6, H2O
Substance/s present before a reaction
reactant
A solid that forms from a solution during a chemical reaction
A solid that forms from a solution during a chemical reaction
precipitate
LIQUID
fluid that conforms to the shape of its container
Substance/s present after a reaction
reactant
One or two letters used to
represent an element
One or two letters used to represent an element
Chemical Symbol
Ag, Cu, Fe, H, O
Reactants are located on which side of the chemical equation
Reactants are located on which side of the chemical equation
left side
SOLID
firm and stable in shape; not liquid or fluid.
A reaction that releases energy in the form of heat
A reaction that releases energy in the form of heat
Exothermic reaction
Uses symbols and formulas to show chemical reactions
Uses symbols and formulas to show chemical reactions
Chemical Equation
Products are located on which side of the chemical equation
Products are located on which side of the chemical equation
Right side
A reaction that absorbs energy in the form of heat
A reaction that absorbs energy in the form of heat
Endothermic reaction
A change in matter
that produces
new substances
A change in matter that produces new substances
Chemical Change or chemical reaction
The total number of atoms are equal on both sides of the chemical equation
True or False
True/ Law of conservation of mass:the elements, number of atoms and mass must be equal on both sides of the chemical equation
Principle that states that matter is not created or destroyed during a chemical reaction
Principle that states that matter is not created or destroyed during a chemical reaction
Law of Conservation
of Mass
Number telling how many atoms are in a molecule or the ratio of elements in a compound
Number telling how many atoms are in a molecule or the ratio of elements in a compound
subscript
Subscripts can be changed within a chemical compound
TRue or False
false