An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A, B, C and D. Also write down the equations for the reactions involved.
A is sodium (Na) because it burns with golden flame in air. B is chlorine ( ) as its atomic number is 17. When Na reacts with , is formed.
