These are general aspects of iron, and its significance varies across scientific, industrial, and nutritional contexts.

Calcium is a chemical element with the symbol Ca and atomic number 20. It is an essential mineral for living organisms, including humans, and plays a crucial role in various physiological processes. 

Sodium Bicarbonate, also known as baking soda, is a chemical compound with the formula NaHCO3. It is a white, crystalline powder that is soluble in water.