which element was first discovered on the sun?

Answer 1

Helium(He), from the Greek, "helios", meaning "the sun".

Answer 2

helium. Scientists observed a different spectrum in the sun from any othe spectrum in earth. They guessed and correctly thought it was a new element. They called it helium which is the greek name for the sun (helios). They believed it was only in the sun but then later thy found out it existed in earth as a very small percentage in air(inert gas). The Sun is made of two gases, helium and hydrogen so i suppose if it is not helium the first to be discovered then it is hydrogen

Answer 3

Hydrogen...I guess it depends on how you read the question. The Sun was known to consist mainly of hydrogen since the early 1800's but was discovered first here on Earth.

Helium's existence was first discovered in 1868 as a bright yellow line in the spectrum of the chromosphere of the Sun by Pierre Janssen.

I guess you're referring to the latter in which case the clickhere's answer is the definitive one.