The nucleus of tritium contains

What is the sum of neutrons and protons in the heaviest isotope of hydrogen?

Hydrogen gas is prepared by using $C$ (coke) and steam in the presence of $Fe_2O_3/Cr_2O_3$. This process is known as:

Fill in the blanks:
$(1)$ In the crystal structure of ice, the oxygen atom is at a distance of $276 \ pm$ from four hydrogen atoms.
$(2)$ The relative proportion of tritium to protium is $1: 10^{18}$.

The difference between heat of adsorption of ortho and para hydrogen is $......... \ kJ \ mol^{-1}$.

When electric current is passed through an ionic hydride in the molten state,