C10 Metals

Question 1

describe metallic bonding

Answer 1

lattice of positive metal ions in a sea of delocalised electrons

giant lattice structure, electrostatic force of attraction, high melting and boiling point, can conduct electricity

Question 2

describe general physical properties of metals

Answer 2

high melting and boiling points, malleable, ductile, good conductors of heat and electricity

Question 3

define malleable

Answer 3

can be bent of hammered into shape

Question 4

define ductile

Answer 4

can be drawn into wires

Question 5

define an alloy

Answer 5

A mixture of a metal with another substance

Question 6

explain why an alloy is more useful than the pure metal

Answer 6

it is harder because the other element disrupts the lattice structure and makes it more difficult to remove the layers from the metal

Question 7

what is a brass

Answer 7

an alloy of copper and zinc

Question 8

why is nickel and chromium alloyed with iron

Answer 8

chromium- to prevent steel from rusting
nickel- makes it harder

Question 9

define an ore

Answer 9

a rock that contains a high enough percentage of metal for economic extraction

Question 10

why is it important that metals are recycled?

Answer 10

because metal ores are finite

Question 11

explain 2 uses of aluminium

Answer 11

Aircraft because of its strength and low density and in food containers because of its resistance to corrosion

Question 12

Place the elements in the order of reactivity
highest——>smallest
Al, C, Ca, Cu, Fe, H2, K, Mg, Na, Zn

Answer 12

K, Na, Ca, Mg, Al, C, Zn, Fe, H2, Cu

Question 13

how does the reactivity of a metal relate to how easy it is to extract from its ore

Answer 13

The more reactive a metal is the more difficult it is to extract from its ore

Question 14

how does the reactivity of a metal relate to its tendency to from a positive ion

Answer 14

the more reactive a metal the easier it is to lose its valence electron(s) and form a positive ion

Question 15

what do we call an alloy that contains iron and other substances

Answer 15

steel

Question 16

how is iron extracted from the metal ore hematite series extracted from their ores

Answer 16

by heating with carbon

Question 17

describe the uses of steel and stainless steel

Answer 17

mild steel for car bodies and machinery and stainless steel for chemical plants and cutlery

Question 18

name an ore which contains iron

Answer 18

Haematite

Question 19

Three raw materials are added to the top of the blast furnace: an iron ore, lime stone and A. What is A?

Answer 19

coke/ carbon

Question 20

describe how metallic and non-metallic elements form bonds

Answer 20

-metals lose electrons and non-metal gain electrons
-metals form positive ions, non metals form negative ions
-electrostatic force of attraction between ions