One remedy for a deficiency of vitamin B12 for the elderly is a regular injection of this important nutrient. The vitamin B12 injection dose depends on factors such as gender and age.
Hydrogen bonds happen in alcohols. As a matter of fact, any molecule that contains a hydrogen atom attached to an atom of nitrogen or oxygen is capable of such a bond. Ethanol is one such alcohol that features hydrogen bonds. Ammonia is an example of hydrogen bonding. In the case of ammonia, however, the hydrogen bond happens to be relatively weak.
Ionic bond is one such chemical bond, which connects atoms in chemical compounds. Hydrogen bonds are intermolecular attractions between molecules. Hydrogen Bonds. When hydrogen is attached to an electronegative atom like fluorine, oxygen or nitrogen, a polar bonding will result.