C2 : Metals and Alloys

Question 1

How do atoms become stable

Answer 1

By gaining a full outer energy level

Question 2

Ionic bonding

Answer 2

Metal + non - metal

Question 3

Covalent bonding

Answer 3

Non metal + non metal

Question 4

What is the structure of metals

Answer 4

Metals consist of a giant structure of atoms arranged in regular layers
The electrons in the outer energy level of each atom are delocalized

Question 5

Metallic bonding

Answer 5

There is a strong electrostatic attraction between the sea of delocalized negative electrons and the positive metal ions.
Scientists call the electrostatic attractions in metals a metallic bond and metallic bonds are strong

Question 6

What is an electrostatic attraction

Answer 6

An attraction between a positive and a negative object

Question 7

Properties of metals

Answer 7

. Metals have a high melting and boiling point because of the metallic bonds
. Excellent conductors of heat and electricity because of the delocalized electrons
. Can carry charge because of the delocalized electrons
. Moving electrons carry thermal energy allowing for metals to conduct heat
. Metals can be bent and shaped as the layers can be slid over each other
.

Question 8

Alloy

Answer 8

. A mixture of metals
. Alloys are harder than pure metals as the different atom sizes distort the metals making it harder for the layers to slide over each other