4 new elements Nh, Mc, Ts and Og

[BobL]

The International Science panel I've been on for the last couple of decades has just named 4 new elements nihonium, moscovium, tennessine, and oganesson.

See http://iupac.org/…/Press-Release_Naming-Four-New-Elements_8… (http://iupac.org/cms/wp-content/uploads/2016/06/Press-Release_Naming-Four-New-Elements_8June2016.pdf)

It's not often we get 4 new ones announced at the same time.

[rwbuild]

There's hope for unatanium yet

Sorry, couldn't resist that one

On a serious note, there is more stuff waiting to be found than that which we are already aware of

[BamBam53]

I believe it it the first time they have named new element after a living scientist. Oganesson recognises Yuri Oganessian.

Regards
Michael

[BobL]

I believe it it the first time they have named new element after a living scientist. Oganesson recognises Yuri Oganessian.

Regards
Michael

Nor quite, Its the second one, Seaborgium was alive when Seaborgium was proposed.

[Luke Maddux]

Wow, awesome. When was the last time we got a new element? I don't recall this happening since I started studying science.

And how about that Tennessine? Named after the greatest state of the fifty!

[Pac man]

Have to update the t shirt to McBaCON

[BobL]

Wow, awesome. When was the last time we got a new element? I don't recall this happening since I started studying science.

And how about that Tennessine? Named after the greatest state of the fifty!

There have been 1 or 2 every few years - Its the first time we have had 4 at the same time for many years.

More recently;
112 Copernicium Cn 2010
114 Flerovium Fv 2011
116 Livermorium Lv 2011

I co-wrote the official recommendations for the last 2
<cite class="citation web" style="font-style: inherit; word-wrap: break-word;">Loss, Robert D.; Corish, John. "Names and symbols of the elements with atomic numbers 114 and 116 (IUPAC Recommendations 2012 (http://pac.iupac.org/publications/pac/pdf/2012/pdf/8407x1669.pdf) IUPAC; Pure and Applied Chemistry. IUPAC. Retrieved 2 December 2015

Sorry that link doesn't work as you need special access rights.</cite>

[AlexS]

How long do these elements exist for, Bob? I suspect they are very ephemeral.

[BobL]

How long do these elements exist for, Bob? I suspect they are very ephemeral.

You are right , Micro/Milliseconds. What amazes me is that in that time they are able to even do a a bit of chemistry!

[Bushmiller]

I guess it would be difficult to label them. Just these tags and nothing in the loop of string :? .

Regards
Paul

[dai sensei]

So is someone updating the atomic table to incorporate the new elements? Just wondering where they would fit

[ian]

So is someone updating the atomic table to incorporate the new elements? Just wondering where they would fit
here you go they're in Row 7, in Columns 13, 15, 17 and 18
have some fun exploring Dynamic Periodic Table (http://www.ptable.com/)
http://www.woodworkforums.com/attachment.php?attachmentid=382703&d=1465751072

[arose62]

Oh no! Now there are thousands of kids who'll have to relearn the periodic table song :(
And some parents ...

[yvan]

Has Mendeleiev himself been honoured in this process?

[BobL]

Has Mendeleiev himself been honoured in this process?
Element 101 is named after him.

The new names and symbols are not yet official - the names are open for public comment for 5 months and changes may be made if they are found to breech technical issues regarding the naming of elements.

So don't write to IUPAC and tell them you want the names changed to include the name of your cat, your dad or your favourite fictional character (yes we have received these requests in the past) :)

Minor technical issue, About a dozen elements no longer have a single atomic weight because the atomic weights for these elements are sample dependent. Their atomic weights are now expressed as an interval e.g. Li [6.938, 6.997]
If you want to perform accurate chemical calculations the atomic weight of the element in the sample must be measured.

To make things simpler for the average Joe and school kids, a table is provided known as a representative atomic weight table so the only have to deal with a single number.

[ian]

Element 101 is named after him.

The new names and symbols are not yet official - the names are open for public comment for 5 months and changes may be made if they are found to breech technical issues regarding the naming of elements.

So don't write to IUPAC and tell them you want the names changed to include the name of your cat, your dad or your favourite fictional character (yes we have received these requests in the past) :)but could we write suggesting that because Elements 104 to 118 have no stable isotopes, they shouldn't have a stable name -- the assigned name could change at a frequency proportional to (or to be really cheeky the inverse proportion) of their half lives?
:wink:

[BobL]

but could we write suggesting that because Elements 104 to 118 have no stable isotopes, they shouldn't have a stable name -- the assigned name could change at a frequency proportional to (or to be really cheeky the inverse proportion) of their half lives?
:wink:

There's a lot more that are unstable.

Tc (Atomic number 43), Pm (61) and everything above Atomic number 84 are unstable.

There is a chance that many more elements are unstable, we just don't have the technology to measure their half lives.

Even Hydrogen is expected to have a half life of ~10^30 years - try getting your head around that one :-)

[ian]

and hydrogen will decay into ...

[ian]

There's a lot more that are unstable.

Tc (Atomic number 43), Pm (61) and everything above Atomic number 84 are unstable.

There is a chance that many more elements are unstable, we just don't have the technology to measure their half lives.
this is getting as bad as determining the winner of a cycling race.

at some point we (in your case "you chemists") need to make a common sense determination.
any element with a half life greater than the age of the earth or the age of the universe (pick one) could by definition be stable.


cycling -- the official rules say "The finish occurs at the instant that the tire of the front wheel meets the vertical plane rising from the starting edge of the finishing line." and digital finish cameras can resolve differences at the level of a single pixel which results in this to dead heat being determined by a pixel
http://inrng.com/medias/images/parisroubaixphotofinish.jpg

[BobL]

Proton decay
https://en.wikipedia.org/wiki/Proton_decay

[QUOTE=ian;1957550]this is getting as bad as determining the winner of a cycling race.

at some point we (in your case "you chemists") need to make a common sense determination.
any element with a half life greater than the age of the earth or the age of the universe (pick one) could by definition be stable. /QUOTE]

That is basically what we do.
Atomics weights are determined for any element that is present in measurable quantities in nature on earth and has a half life of about the age of the earth.