chemical reactions

Question 1

what are the three things a fire needs to keep going?

Answer 1

oxygen,fuel and heat

Question 2

what does copper carbonate turn into when heated?

Answer 2

copper oxide + carbon dioxide

Question 3

what are the things that are involved in a reaction?

Answer 3

reactants

Question 4

how do you balance this: Cu+O2=CuO?

Answer 4

2Cu+O2=2CuO

Question 5

name two ways of separating a chemical reaction

Answer 5

filtration and distillation

Question 6

what is the name of the force that holds atoms together?

Answer 6

bonds

Question 7

what is the difference between endothermic and exothermic?

Answer 7

exo’s let out energy endo’s take in energy

Question 8

how many types of atom are in a element?

Answer 8

one

Question 9

how do you write an element in letters (magnesium)?

Answer 9

Mg

Question 10

name 5 metals?

Answer 10

well done

Question 11

name 5 gases?

Answer 11

good

Question 12

name 5 liquid?

Answer 12

wow

Question 13

what goes on the left of an equation?

Answer 13

reactants

Question 14

name 25 metals?

Answer 14

just joking!!

Question 15

how can you tell if there is carbon dioxide?

Answer 15

lime water goes cloudy