Nitrogen
21nitrogen — 1. A gaseous element, atomic no. 7, atomic wt. 14.00674; N2 forms about 78.084% by volume of the dry atmosphere. 2. The molecular form of n., N2. 3. Pharmaceutical grade N2, containing not less than 99.0% by volume of N2; used as a …
22nitrogen-15 — The less common stable nitrogen isotope, making up 0.37% of natural nitrogen. SYN: heavy nitrogen …
23nitrogen — n. a gaseous element and a major constituent of air (79 per cent). Nitrogen is an essential constituent of proteins and nucleic acids and is obtained by animals in the form of protein containing foods (atmospheric nitrogen cannot be utilized… …
24nitrogen-14 — The common nitrogen isotope, making up 99.63% of natural nitrogen …
25nitrogen — A gaseous element which makes up approximately 80% of the Earth’s atmosphere. Nitrogen is relatively inert and does not support either combustion or life. Nitrogen is usually found in the molecular N2 form …
26Nitrogen — Eigenschaften …
27nitrogen — noun /ˈnaɪtɹədʒən/ a) A chemical element (symbol N) with an atomic number of 7 and atomic weight of 14.0067. The two nitrogens are located next to one another on the ring. b) Molecular nitrogen (N), a colorless, odorless gas at room temperature.… …
28nitrogen-13 — A cyclotron produced, positron emitting radioisotope of nitrogen with a half life of 9.97 minutes; used in protein metabolism studies and in positron emission tomography …
29nitrogen 13 — a radioactive isotope of nitrogen, atomic mass 13, having a half life of 9.97 minutes; it decays by positron emission (1.190 MeV) and is used as a tracer in positron emission tomography …
30nitrogen — noun Nitrogen is used before these nouns: ↑atom, ↑fertilizer …
