by abhishek | Aug 8, 2020 | Periodic Table
Atomic number : 3 Atomic mass : 6.941 g.mol-1 Electronegativity according to Pauling : 1.0 Density : 0.53 g.cm-3 at 20 °C Melting point : 180.5 °C Boiling point : 1342 °C Vanderwaals radius : 0.145 nm Ionic radius : 0.06 nm Isotopes : 2 Electronic shell : 1s2 2s1 or...
by abhishek | Aug 8, 2020 | Periodic Table
Atomic number : 2 Atomic mass : 4.00260 g.mol-1 Electronegativity according to Pauling : 2.1 Density : 0.178*10-3 g.cm-3 at 20 °C Melting point : - 272.2 (26 atm) °C Boiling point : - 268.9 °C Vanderwaals radius : 0.118 nm Ionic radius : unknown Isotopes : 2...
by admin | Aug 8, 2020 | Genetics
Chromosomes can be classified into four types depending on the position of the centromere in it. These are: 1. Metacentric Chromosomes The chromosomes in which the centromere is in exactly middle position are called metacentric chromosomes. These chromosomes are V...
by Rajan Gupta | Aug 8, 2020 | Articles
Air is a mixture of many gases. The molecules of gases present in air have weak inter-molecular forces of attraction. Due to this reason these molecules lie far apart from each other i.e. there are large vacant spaces present between these molecules. So, these...
by admin | Aug 8, 2020 | Genetics
Every plant and animal has fixed number of chromosomes. For example, the human beings have 46 chromosomes in every cell. The chromosomes of each species occur in pairs, out of which one comes from father and the other comes from mother. In this way, we can say that...
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