Question

hydrogen is abundance around sun but not around earth .why ??

Answer 1

hydrogen is abundance around  sun but not around earth because there is no gravity around the earth as it is small so it cannot hold air or hydrogen but sun has much gravity to retain gravity and holds hydrogen.

hope it will help you

Answer 2

Answer:

Explanation:

- Presence of hydrogen depends on its escape from the planet/star.

- On earth r.m.s. velocity of hydrogen is greater than escape velocity, therefore hydrogen escapes the earth making it rare.

- On sun r.m.s. velocity of hydrogen is lesser than escape velocity, therefore hydrogen is bounded to the sun making it abundant.