Bonding

Question 1

How are ions formed

Answer 1

when electrons are TRANFERRED between elements that have a large difference in ELECTRONEGATIVITY

Question 2

what is formed in ionic bonding

Answer 2

a regular lattice of alternating + and - ions form

Question 3

are + ions smaller or larger

Answer 3

smaller

as they have lost electrons

Question 4

are - ions smaller or larger

Answer 4

larger

as they have gained electrons

Question 5

what are the forces between ions

are they strong or weak

Answer 5

electrostatic forces/ attraction between them that hold the lattice together
they are strong

Question 6

what does the structure of lattice depend on

Answer 6

the formula

Question 7

what are the 5 properties of ionic of the ionic structure

Answer 7

• very high melting point
• generally soluble in H20
• electrical insulator when solid
• electrical conductors when molten/ dissolved
• brittle

Question 8

why does an ionic lattice have a very high melting point

Answer 8

• due to strong electrostatic attractions between oppositely charged ions
• they require a lot of energy to break

Question 9

why are ionic lattices generally soluble in H20

Answer 9

• H20 is very polar

- it can disrupt the electrostatic attraction between the ions and break them up

Question 10

why are ionic lattices electrical conductors when molten/ dissolved

Answer 10

ions are free to move so able to carry a charge

Question 11

why are ionic lattices brittle

Answer 11

• when moved ions no longer have an alternating arrangement

- this means that they repel each other and the lattice breaks