Science

The cosmic abundance of the elements.

The 4 most common elements, are hydrogen, helium, oxygen, carbon, and xxxxxx.

What is the 5th most common element?

(answer is 15 minutes)

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My guess is... (without looking at @kaehlys answer) Show more

My guess is... (without looking at @kaehlys answer) Show more

My guess is... (without looking at @kaehlys answer) Show more

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