Chap 2 science vocab

Question 1

chemical reaction

Answer 1

the process by which one or more substances change to produce one or more different substances

Question 2

precipitate

Answer 2

a solid that is produced as a result of a chemical reaction in solution

Question 3

chemical formula

Answer 3

a combination of chemical symbols and numbers to represent a substance

Question 4

chemical equation

Answer 4

a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products

Question 5

reactant

Answer 5

a substance or molecule that participates in a chemical reaction

Question 6

product

Answer 6

the substance that forms in a chemical reaction

Question 7

synthesis reaction

Answer 7

a reaction in which two or more substances combined to form a new compound

Question 8

decomposition reaction

Answer 8

a reaction in which a single compound breaks down to form two or more simpler substances

Question 9

single displacement reacion

Answer 9

a reaction in which one element or radical takes place of another element or radical in a compound

Question 10

double displacement reaction

Answer 10

a reaction in which gas a solid precipitate or a molecular compound forms from the exchange of ions between two compoiunds

Question 11

exothermic reaction

Answer 11

a chemical reaction in which heat is released to the surroundings

Question 12

endothermic reaction

Answer 12

a chemical reaction the requires heat

Question 13

law of conservation of energy

Answer 13

the law that states that energy cannot be created or destroyed but can be changed from one form to another

Question 14

activation energy

Answer 14

the minimum amount of energy required to start a chemical reaction

Question 15

inhibitor

Answer 15

a substance that slows down or stops a chemical reaction

Question 16

catalyst

Answer 16

a substance that charges the rate f a chemical reaction without being used up or changed very much

Question 17

law of conservation of mass

Answer 17

the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes