The organs that perform both the chemical and the mechanical digestion are the mouth and the stomach. Both these organs are one of the initial organs of the digestive tract. The mechanical digestion in the mouth takes place via chewing. The chemical digestion starts in mouth as a result of the enzymes amylase and lipase. The mechanical digestion in the stomach occurs by churning and the chemical digestion is done by protease enzymes.
Most chemical digestion takes place in the duodenum<span> by chemicals secreted by the </span>liver<span>, </span>pancreas<span> and </span>small intestine<span>.</span>
An ionic bond is a type of a chemical bond formed by the complete transfer of electrons from one atom to another atom i.e one of the atoms loses its electrons and the other gains it. This results in the formation of 2 oppositely charged ions.
In sodium chloride, sodium loses one electron from its outermost shell (valence shell) whereas chloride gains it. Due to this sodium gains, a net positive charge and chloride gain a net negative charge.
So, due to the complete transfer of electrons that takes place from sodium to chloride, the compound generated (Sodium chloride) has an ionic bond.