3.1.3.1 Ionic bonding

Question 1

the type of bonding in lithium fluoride

Answer 1

Ionic

Question 2

why a lot of energy is needed to melt a sample of solid lithium fluoride

Answer 2

Strong or many or lots of (electrostatic) attractions (between ions)
Between + and − ions / between Li+ and F− ions / oppositely charged ions

Question 3

Thallium(I) bromide (TlBr) is a crystalline solid with a melting point of 480 °C. Suggest the type of bonding present in thallium(I) bromide and state why the melting point is high.

Answer 3

Ionic
Oppositely charged ions / Tl+ and Br− ions
Strong attraction between ions

Question 4

how the ions are held together in solid sodium chloride

Answer 4

Electrostatic attractions/forces between ions or attractions between
(oppositely charged) ions/ Na+ & Cl

Question 5

Structure of sodium chloride

Answer 5

NaCl is ionic
cubic lattice
electrostatic attraction between ions