What percentage of the earth’s atmosphere is hydrogen?

The layer of gases that forms the atmosphere of Earth is held in place by the planet's gravity and completely envelops the planet. It is made up of different gases.

Different gases make up the Earth's atmosphere in varying proportions. The following are the main gases: -

The majority (78%) is nitrogen
2% of it is oxygen
Argon makes up 0.9 percent.
Trace amounts of carbon dioxide, methane, water vapor, and certain other gases are present in the remaining 0.1 percent.

Among these additional gases, carbon dioxide makes up 0.4%, neon makes up 0.001818%, helium makes up 0.000524%, hydrogen makes up 0.000055%, and many more.

According to the information provided above, hydrogen makes up 0.000055 percent of the earth's atmosphere, which may not seem like much.

Hence, option A is correct.