Physical - Ionic Bonding

Question 1

Ionic lattice.

Answer 1

The ions arrange themselves as an ionic lattice to optimise the number
of electrostatic attractions

Question 2

Cations

Answer 2

Positive metal ions

Question 3

Anions

Answer 3

Negative ion

Question 4

Compound ion

Answer 4

An ion Made up of a group of atoms

Question 5

SO4 -2

Answer 5

Both single bonded oxygen to the sulphur atom has an additional -1
-so gives a -2 charge

Question 6

Crystal

Answer 6

The ordered arrangement of ions in
a material.

Question 7

Significance of lattice structure

Answer 7

This ensures there is electrostatic attraction between the oppositely
charged

Question 8

How to draw an ionic lattice

Answer 8

Clearly label the name of the ion
2)Clearly label the charge on the ions
(2+, 1- etc)
3)Draw at least 9 ions.
4)The ions should be close to each other
in a regular structure
5)Anions (negatively charged)should be
bigger than the cations (positives

Question 9

How can a lattice be broken

Answer 9

Physical stress (lattice bonds broken by force)
* Dissolving
* Heating (ions move apart)

Question 10

Properties of ionic compounds

Answer 10

High melting and boiling point
* Conduct electricity when molten or in solution (not when solid)
* Brittle (breaks easily)

Question 11

High MP or BP

Answer 11

Many strong electrostatic forces of attraction between oppositely
charged ions in the ionic lattice – need lots of energy to overcome
these attractions.

Question 12

Conduct electricity when molten or in solution (not when solid)

Answer 12

Ions cannot move to carry charge in a solid
When molten they are free to move to carry charge

Question 13

Brittle

Answer 13

If horizontal force is applied to the lattice:
The layers of ions move , ions of the same charge are next to each
other.
The layers repel each other and the crystal breaks up