1.1. The table shows the electronic structures of five elements represented by letters, not the chemical symbols of the element.

Give the letters of two elements that belong to the same group in the Periodic Table and state the group that they belong to.

1.2. One of the elements can form the giant covalent structure shown.

i) Give the letter of the element that is represented by the atom labelled A.

(1)

ii) State how the diagram shows that the atom labelled B is oxygen.

(1)

1.3. Give the letter of the element that is monatomic.

Explain your answer.

1.4. Give the letters of two elements that are gases at room temperature.