(b) Hydrogen
Hydrogen is the component which is not present in the fertilizers
Hydrogen has an "atomic number" as 1. The atomic weight is 1.008. This weight in the periodic table it is the very lightest element and it is the most extremely available material in the universe with 75% as the proportion in total.
It is denoted by the letter H and has one neutron and one proton. Hydrogen is “colorless, odorless and tasteless” substance.
