Draw an electron dot diagram: showing the lone pair effect for formation of — NH₄¹⁺ ion from NH₃ gas and H¹⁺.

Give reasons — Hydrogen chloride can be termed as a polar covalent compound.

There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively. Give the molecular formula of the compound formed between E and G and state the type of chemical bond in this compound.

A chemical term for: A bond formed by a shared pair of electrons with both electrons coming from the same atom.