Question

why do terrestrial planets lack hydrogen and helium in their atmosperes a.. hydrogen and helium cant be retained because the planet masses are to small b.... hydrogen and helium were blown by solar wind c.... hydrogen and helium were converted to oyher compounds as the planets formed d....hydrogen and helium are present in rings around the terrestrial planets

Answer 1

ANSWER :

These type of planets do not contain Helium and Hydrogen in their atmosphere. It is because these solar wind blew away these gases from the atmosphere.

So the right choice is (b).

It is known that there are four terrestrial planets in Copernican system. They are : Venus, Mercury, Earth, Mars. These four planets are located close to sun and hence these planets have high temperature due to which Hydrogen and Helium gases escapes from the atmosphere.