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Which planet is also the name of an element?

I came across this question on cosmos quest and need and answer

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closed as off-topic by Envite, RhysW Feb 7 at 12:48

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Can't you just take the nine (eight?) planet names and look for each in an alphabetic list of the elements? –  User58220 Feb 7 at 3:13
    
This question appears to be off-topic because it shown no previous investigation AT ALL. –  Envite Feb 7 at 8:09
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This question appears to be off-topic because it is not within the scope of this site and shows no attempt at prior investigation. –  RhysW Feb 7 at 12:48
    
If you're going to count dwarf planets (Pluto/Plutonium), you should also count Cerium, which was named after Ceres (which was still classified as a planet when the element Cerium was named after it). –  Keith Thompson Feb 8 at 3:33
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3 Answers 3

The answer is Mercury.

Plutonium was made after Pluto was discovered.

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As per ReNiSh A R's post, the answer is Mercury.

A quick Google search took me here: http://en.wikipedia.org/wiki/Timeline_of_chemical_element_discoveries <= second result!

If you control-F search the page, you'll find the following:

Mercury - discovered before 2000BC, so the planet will have been named after the element

Plutonium - About 1940/41, meaning it would have been named after Pluto (before it was declassified as a planet)

Uranus - Uranium discovered around 1789

Neptune - Neptunium discovered 1940

In addition, the only one of those having exactly the same name for both the planet and the element is Mercury.

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Mercury -  Mercury(hg-80)

Mercury will be the Answer, Because Mercury is Very clear name with the 80th Element so planet is(However, Mercury was named after the Roman God which was related to what they called quicksilver).

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Plain wrong. For Uranium, Neptunium and Plutonium it's the other way around. –  Envite Feb 7 at 8:08
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