Define an ionic bond.

Describe what happens to the electrons when a metal atom reacts with a non-metal atom.

Explain why atoms form ions.

State the charge on the ions formed by:

(a) Group 1 elements

(b) Group 7 elements

State when ionic compounds can conduct electricity.

[DRAWING REQUIRED] Draw a dot-and-cross diagram to show the formation of sodium chloride (NaCl).

Show the electron arrangement in:

• The sodium atom before bonding
• The chlorine atom before bonding
• The ions formed

[DRAWING REQUIRED] Draw a dot-and-cross diagram for magnesium oxide (MgO).

Only show the outer shell electrons.

Explain why we use dots for one element and crosses for another in dot-and-cross diagrams.

[DRAWING REQUIRED] Calcium reacts with fluorine to form calcium fluoride.

Draw the dot-and-cross diagram showing the ions formed.

(Atomic number: Ca = 20, F = 9)

When drawing the chloride ion (Cl⁻), explain why you must use square brackets.

Which pair of elements will form an ionic bond?

Write the formula of the ionic compound formed between:

(a) Lithium and oxygen

(b) Calcium and chlorine

State TWO physical properties of ionic compounds.

Describe the structure of sodium chloride.

Explain why solid sodium chloride does not conduct electricity.