A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs and the stable balance of attractive and repulsive forces between atoms when they share electrons is known as covalent bonding.ovalent bonding is implied in the Lewis structure by indicating electrons shared between atoms. The term covalence in regard to bonding was first used in 1919 by Irving Langmuir in a Journal of the American Chemical Society article entitled The Arrangement of Electrons in Atoms and Molecules.
Causes. Leg length discrepancies can be caused by poor alignment of the pelvis or simply because one leg is structurally longer than the other. Regardless of the reason, your body wants to be symmetrical and will do its best to compensate for the length difference.
Leg pain has a number of causes, from exercise to nerve damage caused by an injury or diabetes. It may also be the result of a condition known as restless leg syndrome -- or RLS. While leg pain caused by injury or diabetes is often irreversible, RLS and leg cramps may be caused by a lack of vitamins and nutritional deficiency. Taking certain vitamins may give you some relief, but consult your doctor first.