what relationship do u think there is between the date of discovery of a metal? n there is more questions...?

Question

jus answer any 3 question...is great if u can answer all of them!! if there is website plz list..if u dunt hav is okay
1)what relationship do u think there is between the date of discovery of a metal?
2)how would chemical reactivity affect the extraction use of metal?
3) Explain why copper is often use as roofing material for large building. y do u think is used for temporary??

THX SO MUCH!!!!^^

Answer 1

1) Relationship with what ???????

2) High reactivity would call for more elaborate and controlled extraction methods.

3) Cheap and does not rust or spall.