What life sustaining substance exists in vast amounts on earth, but not on other planets of our solar system

Earth has a large amount of water content which is not on any other planets of Our Solar System.

Explanation:

For sustaining life on the planets, we require large amount of water.

The earth's original atmosphere was mainly made up of carbon dioxide, water vapor and ammonia. There was a little or no amount of oxygen in the early atmosphere of Earth.

As, the Earth cooled down, the water vapor condensed to form oceans. Therefore, about 71% of Earth's surface is covered by water.

Hence, water is the sustaining substance that exists in vast amounts on Earth, but not on other planets of Our solar system.

a

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8