c13

Question 1

what are the properties of transition metals

Answer 1

heat ,good conductors of heat and electricty, dense , high metling point

Question 2

what are transition metals used a

Answer 2

a catatalyst

Question 3

what is a ctatylats

Answer 3

substances that speed up the rate of reaction without being used up in the provess

Question 4

what is corrosion

Answer 4

the destructioj of materials by chemical subtsnces in their environment which act over a period of time

Question 5

what is corrosion caused by

Answer 5

redox reaction

the mtal loses elctron and is oxidised while oxgyen gains electrons and it reduced

Question 6

what is rusting

Answer 6

coorison of iron in the presence of water , oxgyen and air

Question 7

what are the reatacts of rust

Answer 7

rion plus oxggyen plus water

Question 8

what can prevent resutsing

Answer 8

using barrier methods this can stop water nad oxgyen from getting any contact

Question 9

what baririer methods can you use to exlcude oxgyen and water

Answer 9

painting
grease and oil
vacume containers

Question 10

what are the types of scraifical protecting you can do

Answer 10

galvanse

Question 11

what is galvasing

Answer 11

iron is coated with a layer of snc a more reactive elemnt and xinc will react with the oxgyen and carbon dioixde

Question 12

what will happen if the coating is damaged or scrtached

Answer 12

the iron is still prtected from rusting