Nitrogen is a chemical element originated from the Greek ‘nitron’ and ‘genes’ meaning nitre-forming. It was first mentioned in 1772 and observed by D. Rutherford. The isolation was later accomplished and announced by D. Rutherford. “N” is the canonical chemical symbol of nitrogen. Its atomic number in the periodic table of elements is 7 with location at Period 2 and Group 15, belonging to the p-block. The relative atomic mass of nitrogen is 14.0067(2) Dalton, the number in the brackets indicating the uncertainty.
Aluminium, also called aluminum, is a chemical element originated from the Latin name for alum, ‘alumen’ meaningbitter salt. It was first mentioned in 1825 and observed by H.C.Ørsted. The isolation was later accomplished and announced by H.C.Ørsted. “Al” is the canonical chemical symbol of aluminium. Its atomic number in the periodic table of elements is 13 with location at Period 3 and Group 13, belonging to the p-block. The relative atomic mass of aluminium is 26.9815386(8) Dalton, the number in the brackets indicating the uncertainty.
