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.
Covalent bonds occur when the sharing of electrons acts to hold atoms together. However if two different atoms are being bonded then the electrons will not âhang outâ evenly between them. As a rule of thumb the smaller atoms tend to pull more tightly on electrons than larger ones. So the smaller atom in a bonded pair will tend to hog up more than its share of electrons. The atom that holds more tightly onto electrons will have a small negative charge while the other will have a slight positive charge. A covalent bond is consider polar when this inequality in electron sharing becomes significant.