1.3 - Structures

Question 1

What happens to molecular covalent structures when in water?

Answer 1

Insoluble in water

Question 2

the giant covalent structures carbon (diamond) and carbon (graphite) and predict and explain their physical properties ?

Answer 2

Uses: cutting tools (diamond), lubricants and pencils (graphite).
Great electrical conductivity, hard, their melting point and boiling point are high

Question 3

What is a metallic structure?

Answer 3

A metallic lattice is a three-dimensional structure of positive ions and delocalised electrons bonded by metallic bonds.

Question 3

What are physical properties of metallic structures?

Answer 3

1. Metals are good conductors of electricity
2. Metals usually have a high melting point
3. Metals are malleable and ductile

Question 4

What is an alloy?

Answer 4

An alloy is a mixture of two or more elements, at least one of which is a metal, and the resulting mixture has metallic properties.

Question 5

What is an giant ionic lattice?

Answer 5

A giant ionic lattice is a three-dimensional structure of oppositely charged ions held together by ionic bonds.

Question 6

What are giant ionic lattices physical properties?

Answer 6

1. High melting point and boiling point.
2. Soluble in water.
3. Good conductors of electricity when molten or dissolved.

Question 7

How does the molecular covalent structure work?

Answer 7

The molecules are not bonded to each other and there is weak Van der Waals’ forces.

Question 8

What are the physical properties of molecular covalent structure?

Answer 8

1. Low melting point and boiling points
2. Do not conduct electricity
3. Insoluble in water