- Chechnya (Wikipedia)
Chechnya, officially the Chechen Republic, is a republic of Russia. It is situated in the North Caucasus of Eastern Europe, between the Caspian Sea and Black Sea. The republic forms a part of the North Caucasian Federal District, and shares land borders with Georgia to its south; with the Russian republics of Dagestan, Ingushetia, and North Ossetia-Alania to its east, north, and west; and with Stavropol Krai to its northwest.
- Chemical bond (Wikipedia)
A chemical bond is the association of atoms or ions to form molecules, crystals, and other structures. The bond may result from the electrostatic force between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds, or some combination of these effects. Chemical bonds are described as having different strengths: there are “strong bonds” or “primary bonds” such as covalent, ionic and metallic bonds, and “weak bonds” or “secondary bonds” such as dipole–dipole interactions, the London dispersion force, and hydrogen bonding.