metals and there uses

Question 1

what causes corrosion?

Answer 1

iron or tin being exposed to water and air

Question 2

how can you protect against corrosion?

Answer 2

galvanizing- a layer of tin or steel protecting the metal from being exposed to air or water
or being protected by a layer of paint, powder or oil.

Question 3

how does salt increase the rate of corrosion?

Answer 3

brings in more dissolved ion’s into the area

Question 4

name the properties of metals

Answer 4

good conductors, electricity, shiny, high melting point, malleable

Question 5

what is a pure metal?

Answer 5

metals that are made of one kind of element. all the atoms are the same size and ahve the same properties.

Question 6

why are alloy’s stronger than pure metals?

Answer 6

because of the different sizes of atoms causing distortion, makes it difficult for the layers of atoms to slide over each other. making it stronger and less malleable.

Question 7

advantages of alloys

Answer 7

• increased hardness
• prevents corrosion/rusting
• smooth appearance

Question 8

what are group one metals?

Answer 8

the most reactive kind.