4.2 Notes

Question 1

Properties of ionic compounds

Answer 1

High melting points solid at room temp as the ions are attracted to each other

Most are hard brittle and can be crushed

Form crystals in alternating formation of positive and negative
When crystals broken they form the clevage point and are flat

Dissolve in water to form solutions that conduct electricity as ions are released into the water

Question 2

Diatomic elements common

Answer 2

Hydrogen 
Oxygen 
Fluorine 
Bromine 
Iodine 
Nitrogen 
Chlorine

Question 3

Uncommon diatomic elements

Answer 3

Diphosphorus

Disulfer
Dilithium

Question 4

Properties of molecular compounds

Answer 4

Can be solid liquid or gas at room temp 
Often soft 
Have relatively low melting points 
Dissolve in water to form solutions that are not good conductors of electricity
Ex 
Sugar
Water 
Hydrogen peroxide
Carbon dioxide