chemical reactions Flashcards
1
Q
process to rearrange atoms into new substances
A
chemical reactions
2
Q
chemical symbols and numbers to represent a substance
A
chemical formula
3
Q
expression to show the relationship between reactants and products
A
chemical equation
4
Q
substances that participate in a reaction (start)
A
reactants
5
Q
substances formed in a reaction (end)
A
products
6
Q
mass can not be created or destroyed
A
law of conservation of mass
7
Q
energy can not be created or destroyed
A
law of conservation of energy
8
Q
reaction with an input of energy (photosynthesis)
A
endothermic reaction
9
Q
reaction with and output of energy (feel heat from burning)
A
exothermic reaction
