FAKE TAN TIP 1: SCRUB UP. âExfoliate, exfoliate exfoliate! This will remove dead skin cells and create a smooth and uniform surface on the skin for the tan to be applied to, which will in turn result in an even golden colour.
Covalent chemical bonds involve the sharing of a pair of valence electrons by two atoms, in contrast to the transfer of electrons in ionic bonds. Such bonds lead to stable molecules if they share electrons in such a way as to create a noble gas configuration for each atom. Hydrogen gas forms the simplest covalent bond in the diatomic hydrogen molecule. The halogens such as chlorine also exist as diatomic gases by forming covalent bonds.
2) There are two types of valence shell electron pairs viz., i) Bond pairs and ii) Lone pairs. Bond pairs are shared by two atoms and are attracted by two nuclei. Hence they occupy less space and cause less repulsion. Lone pairs are not involved in bond formation and are in attraction with only one nucleus.