printable periodic table of elements prentice hall

IUPAC invites the credited discoverers to submit a name and symbol for the new element drawn from a mythological concept, mineral, country or place, property or scientist.

The element gets a provisional Greek name and square in the periodic table.

IUPAC publishes its analysis in its official journal Pure and Applied Chemistry in which it establishes who discovered the element and how it was made.

IUPAC analyzes the claim as to who discovered it (often competing labs claim discoveries of new elements), whether the experiments were valid and whether it meets the criteria for a new element.

The claim that a new element has been found must be published in the scientific literature.

But the procedure for naming an element is as follows: That means it's a long, difficult road to verify the claim that a new element has been discovered.

Two difficulties exist in confirming these new elements: First, they're not produced in large quantities, and second, they don't last very long. In addition, any new element discovered must have a lifetime greater than 10 -14 seconds. Remember that the new elements are all radioactive ones that are made in particle accelerators and have short lives before they decay into another element.

Ununquadium doesn't exactly roll off the tongue, so how does an element get a new title and achieve official status? And are there any naming restrictions? Is christening an element after a beloved pet strictly frowned upon, but after a hometown or lab location accepted? Of course, nothing in science is static, so it's always good to check with IUPAC if you're unsure about whether an element is official or not.

There are spots in the periodic table for elements with atomic numbers 115 and 117, but these elements haven't been discovered, much like Mendeleyev left gaps in his table for elements that hadn't turned up yet. They are unofficially called ununbium (Uub), ununquadium (Uuq), ununhexium (Uuh) and ununoctium (Uuo), respectively - Greek for the atomic numbers of these elements. The last elements to be discovered had atomic numbers of 112, 114, 116 and 118.

Printable periodic table of elements prentice hall