Give the general group study of hydrogen with reference to:(i) valence electrons(ii) burning(iii) reducing power.

(i) Valence Electrons: Hydrogen has one valence electron in its outermost shell. This allows it to bond with other elements that can either accept or donate an electron, making it a very reactive element.

(ii) Burning: Hydrogen is highly flammable. When it comes into contact with a source of heat or a spark, it can ignite and burn with a pale blue flame, producing water vapor as a byproduct. This reaction is represented by the equation: 2H2 + O2 → 2H2O.

(iii) Reducing Power: Hydrogen is a powerful reducing agent. It can donate electrons to other substances in a chemical reaction, reducing them while it itself gets oxidized. This is why it's often used in reactions to convert metal oxides into pure metals, as well as in the production of ammonia in the Haber process.