Question

Please answer question 1 please !!!!!!!!!!!!

Answer 1

Answer:

A ---> Sodium (Na)

B ---> Sodium Oxide (Na₂O)

Explanation:

The reason why I choose Sodium because:

(i) Given that element A reacts with Oxygen to form Oxide B which is basic (8.5 pH). We know that metallic oxides are basic in nature.

(ii) It loses one electron to form argon (noble gas configuration) .

So, it has 11 electrons and we know that sodium has 11 electrons