Physics News

[Henry J]

On looking at what they think period 8 will look like, when they have enough samples from those elements to actually measure their properties, it's not a simple extrapolation from the pattern that the first seven periods have.

https://en.wikipedia.org/wiki/Extended_periodic_table
(See diagram below the introduction and table of contents)

The known periods (after the short 1st one) have two columns on the left, and 6 columns on the right, and after the first 3 periods, a bunch of stuff in between. But in that diagram, the 2 column section for period 9 is expected to get filled before the 6 column section that should be in period 8?

I guess technically that means that the s sub-shell (the one with 2 columns) has lower energy than that p sub-shell (the one with 6 columns)?

[lswot]

..

[Henry J]

What, you don't like physics? At least it isn't temporal mechanics!

[lswot]

What, you don't like physics? At least it isn't temporal mechanics!

Well, there is that......but, still........

[Xjmt]

I think some folks are still here but don't post very often.

[lswot]

I think some folks are still here but don't post very often.

I have to agree with you.......I hear an echo....echo....echo

[Xjmt]

I think some folks are still here but don't post very often.

I have to agree with you.......I hear an echo....echo....echo

[Henry J]

Can you repeat that?

[Xjmt]

[lswot]

He is such a child....

[Xjmt]

[Henry J]

I read that labs in Japan and Russia have recently started attempts to produce atoms of element 119, to be followed by element 120. I suppose they could do it in either order. They're both getting raw materials from ORNL (Oak Ridge National Laboratories), for one of the isotopes they need for this, the one that is itself an artificial element that has to be made in a laboratory. If successful this would start a new row on the table, giving it a total of 8 rows. (In school I was taught that it had just 7 rows.)

The article said that elements passed 120 may be beyond current technology, because their expected half lives are so short, and any atoms they produced would decay before they got in range of the detectors. Of course, all they detect for any of these really heavy elements is the decay products from nuclei that no longer exist when the decay products are detected, but still.

On interesting tidbit here is that for the last dozen or so elements added to the table, they can count the number of atoms that have been detected.

[brian]

[Xjmt]

https://www.yahoo.com/news/m/9d42fefb-7 ... vered.html

[Henry J]

I thought we already knew that CPR could sometimes work a few minutes after a heart stopped.