Alloys And Corrosion

Question 1

Where are transition metals found?

Answer 1

In groups 2 and 3 of the periodic table

Question 2

What are the physical properties of transition metals?

Answer 2

High melting points, high densities, strong and hard (suitable for construction materials)

Question 3

What are the chemical properties of transition metals?

Answer 3

Formation of coloured compounds, catalytic activity

Question 4

What causes corrosion?

Answer 4

The oxidation of metals. The corrosion of iron and steel is called rusting

Question 5

We prevent rusting by keeping oxygen and water away from iron and steel. This can be done by:

Answer 5

Painting, using oil or grease, etc

Question 6

What does electroplating a metal improve and how does it work?

Answer 6

A metal is electroplated to improve its appearance and resistance to corrosion. It involve coating a metal with a nonreactive metal keep air and water out (it prevents oxidation reactions from occurring)

Question 7

Stainless steel are iron alloys that resists corrosion. How does it do this?

Answer 7

It contains chromium - an invisible layer of chromium oxide oxide forms on the surface and stops oxygen and water getting in.