Science / Periodic Table of Elements / Nitrogen (N): Atomic number: 7, Atomic mass: 14.0067 g.mol -1, Electronegativity: 3.0, Density: 1.25*10-3 g.cm-3 at 20?°C, Melting point: -210 ?°C, Boiling point: -195.8 ?°C, Vanderwaals radius: 0.092 nm, Ionic MORE
Science / Genetics / Nitrogenous Base: A nitrogen-containing molecule having the chemical properties of a base. Dna contains the nitrogenous bases adenine (a), guanine (g), cytosine (c), and thymine (t). MORE
Science / Marine Biology / Nitrogen Fixation: The conversion of gaseous nitrogen to nitrate by specialized bacteria. MORE
Science / Weather / Nitrogen (N2): A colorless, tasteless, odorless gas that is the most abundant constituent of dry air. It comprises 78.09%. MORE
Science / Chemistry / Protein: A complex polymer made by linking together amino acid molecules. Proteins sometimes contain non-amino acid components such as metal ions or porphyrin rings embedded within. MORE
Science / Genetics / Guanine (G): A nitrogenous base, one member of the base pair gc (guanine and cytosine) in dna. MORE