Talk:Periodic table

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Electron configuration

ref: C Moore, Atomic Energy Levels, Vol 1, US Bureau of Standards, 1949

Period	s	p	d	f
1^a K	_s02				n = 02
2^a L	_s02	_p06			n = 08
3^a M	_s02	_p06	_d10		n = 18
4^a N	_s02	_p06	_d10	_f14	n = 32
5^a O	_s02	_p06	_d10	_f14	n = 32
6^a P	_s02	_p06	_d10		n = 18
7^a Q	_s02	_p06			n = 08

R. Portela F. (talk) 21:33, 2 September 2014 (UTC)[reply]

Suggested for you guys, a hug.

Periodic table

¹H																	²He
³Li	⁴Be											⁵B	⁶C	⁷N	⁸O	⁹F	¹⁰Ne
¹¹Na	¹²Mg											¹³Al	¹⁴Si	¹⁵P	¹⁶S	¹⁷Cl	¹⁸Ar
¹⁹K	²⁰Ca	²¹Sc	²²Ti	²³V	²⁴Cr	²⁵Mn	²⁶Fe	²⁷Co	²⁸Ni	²⁹Cu	³⁰Zn	³¹Ga	³²Ge	³³As	³⁴Se	³⁴Br	³⁶Kr
³⁷Rb	³⁸Sr	³⁹Y	⁴⁰Zr	⁴¹Nb	⁴²Mo	⁴³Ts	⁴⁴Ru	⁴⁵Rh	⁴⁶Pd	⁴⁷Ag	⁴⁸Cd	⁴⁹In	⁵⁰Sn	⁵¹Sb	⁵²Te	⁵³I	⁵⁴Xe
⁵⁵Cs	⁵⁶Ba	*	⁷²Hf	⁷³Ta	⁷⁴W	⁷⁵Re	⁷⁶Os	⁷⁷Ir	⁷⁸Pt	⁷⁹Au	⁸⁰Hg	⁸¹Ti	⁸²Pb	⁸³Bi	⁸⁴Po	⁸⁵At	⁸⁶Rn
⁸⁷Fr	⁸⁸Ra	**	¹⁰⁴Rf	¹⁰⁵Db	¹⁰⁶Sg	¹⁰⁷Bh	¹⁰⁸Hs	¹⁰⁹Mt	¹¹⁰Ds	¹¹¹Rg	¹¹²Cn	¹¹³Uut	¹¹⁴Fl	¹¹⁵Uup	¹¹⁶Lv	¹¹⁷Uus	¹¹⁸Uuo
		*	⁵⁷La	⁵⁸Ce	⁵⁹Pr	⁶⁰Nd	⁶¹Pm	⁶²Sm	⁶³Eu	⁶⁴Gd	⁶⁵Tb	⁶⁶Dy	⁶⁷Ho	⁶⁸Er	⁶⁹Tm	⁷⁰Yb	⁷¹Lu
		**	⁸⁹Ac	⁹⁰Th	⁹¹Pa	⁹²U	⁹³Np	⁹⁴Pu	⁹⁵Am	⁹⁶Cm	⁹⁷Bk	⁹⁸Cf	⁹⁹Es	¹⁰⁰Fm	¹⁰¹Md	¹⁰²No	¹⁰³Lr

Click on the elements in Periodic table Adobe Reader and download.

Overview & layout

I have changed the section title 'Layout' into 'Overview'. I think right after the lede, we should describe the main characteristics, not the graphical intricacies. Also, I want to tear away the graphical options from the structural variants (aka alternative periodic tables, or variants).

I started putting those graphic issues (mainly 18 vs. 32 column, but there is more) in a single subsection. This way, we don't have to explain the issue in every section.

But I have not nice solution for the next questions. Any ideas?

Maybe the graphic points are not important enough to be in section #2. After all, the structural background (group, period) is what the PT is about. Is there a natural, lower position for this section?
Somehow we need to add a link like "See section #Alternative structures". Any good practice for such an in-page link?
We could note Mendeleev's 8-group PT in this graphics section, as a background. But only in a few words then, I think he can be described in the History and Alternative structures sections.
About #Open controversies. I have not found a way to describe these element-level issues in this graphic section (like "Placement of hydrogen and helium", and "Period 6 and 7 elements in group 3"). Shall we use these sentences: "Within a given layout, helium can be placed in group 18 or in group 2", and "Within a given layout, there can be variants like Sc/Y/Lu/Lr vs. Sc/Y/La/Ac"?

-DePiep (talk) 11:42, 18 September 2014 (UTC)[reply]

About that opening section 'Overview'. As it is now, it has 2/3 paragraphs about the heavy elements (situation today, discovery). Let me propose that we move those (mostly) to a section in 'History' (with subsection title: 'Today' ;-) ), where developments & timelines are a natural way of describing. Also, the 'Overview' section could use more basic notes about, say, groups/columns and periods/rows structure as the basic periodicity. @Double sharp: ping. -DePiep (talk) 11:56, 18 September 2014 (UTC)[reply]

@Sandbh: ping (how do you ping all the WP:ELEM members?)

I have read this post; this is a placeholder that will be replaced by a reply once I think I've finished mulling over it. Double sharp (talk) 15:16, 18 September 2014 (UTC)[reply]

Metal-metalloid-nonmetal section

In section Periodic_table#Classification_into_metals.2C_metalloids_and_nonmetals I've made some edits too. I changed its title, because "Categorisation" is not a universal term in this (we use it in enwiki because it nicely has a single meaning, other than say 'series'). I also added a new image that shows the three major categories in the PT. Improvements may well be possible or even needed. -DePiep (talk) 14:35, 18 September 2014 (UTC)[reply]

Groupings -Classification into metals, metalloids and nonmetals

Reading through the recent edits I noticed these statements which over-simplify the situation- "Metals are ordinarily shiny, highly conducting solids which form alloys with one another and salt-like ionic compounds with nonmetals. Nonmetals are mostly coloured or colourless insulating gases that form covalent compounds with one another." Ummm. Metals do not form salt-like compounds with the non-metals that are the noble gases. The only reactive non-metals which are gases are nitrogen, oxygen, chlorine and fluorine. The rest are solids or in the case of bromine a liquid. I am still up to my neck in other commitments so I am afraid I cannot make the necessary tweak.Axiosaurus (talk) 18:14, 19 September 2014 (UTC)[reply]

These texts were not edited yesterday ;-). And I too had a question marks about them. A first thought was: what would we loose if we deleted them completely? The three categories are mentioned and linked already. However, we could use a sentence that describes not what a metal is, but why metal-nonmetal is important for the periodic table. -DePiep (talk) 19:23, 19 September 2014 (UTC)[reply]

Fixed with some copy-editing. Sandbh (talk) 23:29, 19 September 2014 (UTC)[reply]

We are still claiming that Nonmetals are mostly ... gases. Actually, of the 17 elements shown as nonmetals in the Image Metals, metalloids and nonmetals in the periodic table, only 11 are gases at 298 K and 1 atm. I think that six exceptions (C, P, S, Se, Br, I) are too many to say mostly - it would be better to say The majority of nonmetals are ... gases. Dirac66 (talk) 02:23, 20 September 2014 (UTC)[reply]

OK, one more time then :) Sandbh (talk) 05:19, 20 September 2014 (UTC)[reply]

Can someone qualified evaluate adding a periodic table here ?

Am not expert in editing Wikipedia nor on the subject; but it has resided in my favorite links many years and just found out it is not mentioned in the main article page :

> http://www.perfectperiodictable.com/

75.227.64.209 (talk) 20:00, 28 November 2014 (UTC)MB-28Nov2014-Externet[reply]