Nitrogen:The seventh element of the periodic table between carbon and OXYGEN is Nitrogen.It’s an important part of amino acids.Around eighty percent of the Earth’s atmosphere comprises nitrogen gas.It has no colour, mostly diatomic non metal gas along with odourless and colourless in nature.Since it has five ELECTRONS in its outer SHELL, most of its compounds are trivalent.It is a constituent of all living tissues. Since it is a component of DNA and part of a genetic code, it is an essential element of life.It is found in nitrates and nitrites in soil and water.Metallic Oxide:Metal oxides are crystalline solids that contain a metal cation and an oxide anion.They typically react with water to form bases or with acids to form salts.The alkali metals and alkaline earth metals form three different types of BINARY oxygen compounds:1. Oxides, containing oxide ions, O²-,2. Peroxides, containing peroxide ions, O²²−, which contain oxygen-oxygen covalent single bonds, and3. Superoxides, containing superoxide ions, O²−, which also have oxygen-oxygen covalent bonds but with one fewer negative charge than peroxide ions.Alkali metals (which have a +1 oxidation state) form oxides, M²O, peroxides, M²O², and superoxides, MO². (M represents a metal atom.) The alkaline earth metals (with a +2 oxidation state) form only oxides, MO, and peroxides, MO².All the alkali metal oxides can be prepared by heating the corresponding metal nitrate with the elemental metal.2MNO³ + 10M + heat → 6M²O + N2A general preparation of the alkaline earth oxides involves heating the metal carbonates.Molten Sulphur:Sulfur burns with a blue flame, concomitant with formation of sulfur dioxide, NOTABLE for its peculiar suffocating odor.Sulfur is insoluble in water but soluble in carbon disulfide and, to a lesser extent, in other nonpolar organic solvents, such as benzene and toluene.The first and the second ionization energies of sulfur are 999.6 and 2252 kJ/mol, respectively.Despite such figures, S2+ is rare, with S+4 and S6+ being more common.The fourth and sixth ionization energies are 4556 and 8495.8 kJ/mol.The magnitude of the figures is caused by electron transfer between orbitals; these states are only stable with strong oxidants such as fluorine, oxygen, and chlorine.