An element X combines with hydrogen to form a compound XH3. The element Xis placed on the right side of the periodic table. Which of the following statement is correct for element X?
I. Has two valence electrons.
II. Is a metal and is solid.
III. Is a non-metal and is a gas.
IV. Has five valence electrons.
V. XH3 reacts with water to forma basic compound.
The element X is nitrogen which reacts with hydrogen to form NH3. Nitrogen is a non-metal and a gas. It has 5 valence electrons (electronic configuration:2,5) and reacts with water to form ammonium hydroxide (NH4OH) which is basic in nature.