Reactions and Y9 recap

Question 1

What is an exothermic reaction?

Answer 1

energy is transferred to the surroundings

Question 2

how does filtration work?

Answer 2

liquid passes through the filter paper and insoluble particles get caught

Question 3

where is most of the mass in an atom located

Answer 3

nucleus

Question 4

What happens to the temperature of an exothermic reaction?

Answer 4

temperature increases

Question 5

what is an endothermic reaction

Answer 5

energy is taken in from surroundings

Question 6

What happens to the temperature of an endothermic reaction?

Answer 6

temperature decreases

Question 7

give an every day use of endothermic reaction

Answer 7

sport injury pack

Question 8

What is the energy of the products compared to reactants in an exothermic reaction

Answer 8

less

Question 9

What is the energy of the products compered to reactants in an endothermic reaction

Answer 9

more

Question 10

what is activation energy

Answer 10

Minimum energy that particles must have for a reaction to occur

Question 11

how do ionic bonds form?

Answer 11

when metals react with non-metals by transferring electrons

Question 12

how do covalent bonds form?

Answer 12

when a pair of electrons is shared between two atoms, usually non-metals