Bonding

Question 1

What is ionic bonding ?

Answer 1

Ionic bonding involves electrostatic attraction between oppositely charged ions in a lattice

Question 2

What are the properties of an ionic substance?

Answer 2

High mp and bp
good solubility in water
poor conductivity when solid but good conductivity when molten
Brittle- layers of ions move relative to each other , ions of the same charge repel

Question 3

When is ionic bonding stronger ?

Answer 3

When the ions are smaller and have higher charges

Question 4

What is a simple covalent ?

Answer 4

Shared pair of electrons

Question 5

What is a dative bond ?

Answer 5

a shared pair of electrons with both electrons supplied by one atom

Question 6

What are the properties of simple molecules?

Answer 6

Low mp and bp
poor solubility in water
poor conductivity

Question 7

What is metallic bonding ?

Answer 7

Attraction between delocalised electrons and positive ions arranged in a lattice

Question 8

What are the properties of metallic bonding ?

Answer 8

high mp and bp
insoluble
good conductivity - delocalised electrons
malleable - layers of ions slide over each other

Question 9

What are the factors that affect metallic bonding ?

Answer 9

number of protons
number of delocalised electrons
size of ion - smaller ion the stronger the bond.

Question 10

What are the properties of a macromoleular substance ?

Answer 10

high mp and bp ( strong covalent bonds)
insoluble in water
diamond and sand are poor conductors
graphite good conductor (delocalised electrons )