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Mutt · 07-09-2014, 07:55 AM

This was a man-made element. How do we know we've found all of the naturally occurring elements?

The good thing with elements is that they're defined by atomic numbers, meaning they're defined by the number of protons in the nucleus. This number is never a fraction, so you can't have, say, 3.2 protons in a nucleus. So we know we have them all because we know of an element with one proton and an element with two protons and so on.

************************************************** ***************

And there you have it, 'we have them all'

The new element 115 is a man made element.

07-09-2014, 07:55 AM
Mutt Too lazy to set a custom title Industry Role: Join Date: Sep 2002 Posts: 34,431	This was a man-made element. How do we know we've found all of the naturally occurring elements? The good thing with elements is that they're defined by atomic numbers, meaning they're defined by the number of protons in the nucleus. This number is never a fraction, so you can't have, say, 3.2 protons in a nucleus. So we know we have them all because we know of an element with one proton and an element with two protons and so on. ************************************************ ************* And there you have it, 'we have them all' The new element 115 is a man made element. __________________ I moved my sites to Vacares Hosting. I've saved money, my hair is thicker, lost some weight too! Thanks Sly!