- 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.
- Alexei Navalny (Wikipedia)
Alexei Anatolyevich Navalny (Russian: Алексей Анатольевич Навальный, IPA: [ɐlʲɪkˈsʲej ɐnɐˈtolʲjɪvʲɪtɕ nɐˈvalʲnɨj]; 4 June 1976 – 16 February 2024) was a Russian opposition leader, lawyer, anti-corruption activist, and political prisoner. He organised anti-government demonstrations and ran for office to advocate reforms against corruption in Russia and against President Vladimir Putin and his government. Navalny was founder of the Anti-Corruption Foundation (FBK). He was recognised by Amnesty International as a prisoner of conscience, and was awarded the Sakharov Prize for his work on human rights.