tooic 5 Flashcards
1
Q
how can rusting be prevented
A
painting
coating with plastic
oil or grease
keep oxygen away eg vacuum container
put another metal around the one u want (galvanise)
2
Q
Why’s aluminium good for rusting
A
Has an oxide coating that protects the metal from further corrosion
3
Q
what is electroplating
A
acts as barrier to exclude oxygen and water
makes metals attractive
4
Q
how to do electroplating
A
metal to be played is cathode
metal playing it with is anode
cathode sends electrons to anode m
5
Q
why are pure metals soft
A
they are the same size and regular arrangement
slide over easy making them soft and malleable
6
Q
where are metals from ores found
A
in earths crust
7
Q
what are un reactive metals found as
A
in the earths crust as uncombined elements
