Metals

Question 1

General properties of metals

Answer 1

good conductor of hear, electricity
high densities, melting and boiling point
malleable and ductile

Question 2

What are alloys?

Answer 2

mixture of metal with ne or a few other elements

Question 3

Why pure metal not widely used in industry?

Answer 3

1. soft, layers of atoms can slide over one another easily when a force is applied
2. they react easily with air or water and corrode

Question 4

Why are alloys stronger and harder than their constituent metals?

Answer 4

atoms of different metals or elements have different sizes
regular arrangement in pure metal is disrupted
atoms cannot slide past as easily when force applied

Question 5

Metal react with cold water to form

Answer 5

metal hydroxide and hydrogen gas

Question 6

Metal react with steam to form

Answer 6

metal oxide and hydrogen

Question 6

Metal react with steam to form

Answer 6

metal oxide and hydrogen

Question 7

Metal react with dilute HCL to form

Answer 7

metal chloride and hydrogen

Question 8

A more reactive metal can… state 5 things

Answer 8

1. displace less reactive metal from its salt solution
2. reduce oxide of less reactive metal
3. decompose with more difficulty

Question 9

What are the conditions for rusting?

Answer 9

oxygen and water

Question 10

Rust prevention methods include?

Answer 10

using a protective layer
using sacrificial metal
using alloys