Question

arrange H2 D2 and t2 in the decreasing order of their boiling points​

Answer 1

hope it is helpful to u study understand and write

Answer 2

The hydrogen has three isotopes:- protium, deuterium and tritium.

Explanation:

• Protium:- It is also known as ordinary hydrogen and is the most abundant isotope of hydrogen. The nucleus has one proton and one electron($H^1 _1$).  The melting point of $H_2$ is 13.96 K.
• Deuterium:- It is also known as heavy hydrogen. The melting point of $D_2$ is 18.73 K.
• Tritium:-  It is the least abundant isotope of hydrogen. The melting point of $T_2$ is 20.62 K.

The decreasing order of their boiling point is:-$T_2 > D_2 > H_2$.