ساينس الصف السادس الإبتدئي الفصل الدراسي الاول ساينس سادسة ابتدائي – ترم أول In This Lesson we will study : Nitrogen represents 78% percent from the air volume so it is the most abundant gas in air. It is a gaseous element, its compound has 2 Nitrogen atoms (N2) Nitrogen exists in: (1) Nitrogen is the main component of the proteins which make tissues of all living organisms. (2) Nitrogen oxides are formed during the lightening and reach the earth during the rainfall. (3) Nitrogen is used by the legumes plants to produce protein, with the help of nodular bacteria in roots. Properties of Nitrogen gas: a) It is colorless, tasteless and odorless gas. b) Hardly (scarcely) dissolves in water . c) Doesn’t help in burning. Nitrogen is called azotes (lifeless) (G.R) because it doesn’t help in burning and it is not included in respiration process. لمتابعة مستر احمد الباشا وكل ما يخص الساينس : جروب الفيس بوك http://bit.ly/2Of1mcN صفحة الفيس بوك http://bit.ly/2Gq5xMo بالتوفيق مستر احمد الباشا