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Radium: Plutonium does not occur naturally, and magnesium has a low density for a metal.

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Q: What is the heaviest naturally occurring metal on Earth magnesium or radium or plutonium?
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How many simple elements are there in the periodic table?

It depends on what you mean by 'simple'. If you mean naturally occurring then 92 as Plutonium-244 is the heaviest naturally occurring element. Any over this are synthetic. however i don't know what you mean by 'simple'


Which element is the heaviest actininde that occurs naturally on earth?

Uranium is the heaviest naturally occurring actinide.


How many electrons does the heaviest naturally occurring element have?

The heaviest naturally occurring element is uranium, and it has 92 electrons.


What is the heaviest naturally occurring element?

I have just had to research this question for materials science homework.The answer that i have come up with is -Hydrogen is the lightest stable element with only one proton.Uranium is the heaviest with 92 protons. But scientist have discovered an eliment called eliment 118 that fits just below radon on the periodic table this eliment was supposed to have been discovered in 1999 but was said to have been made up. So i will go with uranium as being the heaviest known stable element for now.


What is the heaviest element known to exist naturally on earth in quantities detectable by purely chemical test methods?

Now californium is considered as the heaviest naturally occurring chemical element.


What is the heaviest usable metal?

Bismuth (Bi) is the heaviest nonradioactive element but the next heaviest is Lead (Pb) and that is much more commonly used. The heaviest element that is naturally occurring, and also usable, though radioactive, is Uranium (U).


Worlds heviest man- made element?

This element is ununoctium - atomic number 118; uuo is an artificial element. I suppose that you think to atomic mass and not to density.


Who what is the heaviest of the naturally occurring noble gases?

Radon is the name of the heaviest noble gas.


Can a natural isotope be radioactive?

Yes; some of the naturally occurring isotopes of the heaviest elements are radioactive.


Radon is the most heaviest naturally radioactive what?

Radon is one of the noble (inert gases), is radioactive (half-life of about 4 days, decaying to polonium), and is naturally occurring in relatively small quantities. Whether or not it is the heaviest of this group, I am not sure...perhaps someone else can verify.


Are there no new elements to be discovered?

No. Uranium is the heaviest naturally occurring element. More elements can be prepared artificially. New isotopes of the element may be discovered.


Which is the hevest element in the periodic table?

The heaviest (hevest?) naturally occurring element is Uranium (238 a.m.u.) but the heaviest known element is atom number 114, 117 or 118, the exact mass being unknown but over 250.