Topic 3 STRUCTURES

Question 1

What is the structure of a giant ionic lattice

Answer 1

GIRLS - Giant Ionic Repeating Lattice Structure

Question 2

Examples of giant ionic lattice

Answer 2

Sodium chloride and magnesium oxide

Question 3

Properties of giant ionic lattice

Answer 3

Crystalline, brittle, high melting points
Conducts electricity when a liquid but not when a solid
Soluble in water

Question 4

Structure of a covalent molecular

Answer 4

Simple covalent with weak intermolecular forces called van der waals

Question 5

Examples of covalent molecular

Answer 5

Iodine (solid)
Carbon dioxide (gas)
Water(liquid)

Question 6

Properties of covalent molecular

Answer 6

Low melting / boiling points
Don’t conduct electricity
Not very soluble
Soft when solid

Question 7

What is an allotrope

Answer 7

Allotropes are different forms of the same element in the same physical state

Question 8

What is metallic bonding

Answer 8

Is the attraction between delocalised electrons and the positive ions in a regular lattice

Question 9

What does ductile mean

Answer 9

Can be drawn into wires

Question 10

What is the properties of giant covalent structures

Answer 10

High melting/boiling point
Graphite conducts electricity because it has delocalised electrons. Diamond does not
Insoluble

Question 11

Examples of giant covalent

Answer 11

Diamond and graphite