Prior to its discovery on earth, helium was first detected in the sun. explain how this can be possible.

Helium is not that common on earth, it does not react with other elements, and scientists didn't know that it should exist and so they weren't looking for it on earth. The element that created the lines they found in the sun's spectrum in 1868 was believed to be a new element and was  named helium (from the Greek ''Helios'' meaning sun) and when they finally knew it existed they found it on earth.

Hope this helps!

The correct answer is b

Adozen is 12, and your needing to calculate the weight of one medium egg, so i would do 21/12=1.75 per egg, and check your answer by doing 1.75 * 12= 21 : ) : ): ): ): ) i hoped i