MyWiki:WikiProject Elements/PTG/categories/2020

1. REDIRECT Wikipedia:WikiProject Elements/PTG/tab header

{{Periodic table}}

PT-legend

s-block

g-block

f-block

d-block

p-block

Summary of changes from 2018

• Restore "halogen" (X) and "other nonmetal" (ONONM) categories from 2010 version
• "Unknown chemical properties" is now used only for predicted elements (E119 and up)
• Group 12 elements are classified as TM
• AM color lightened
• Categories removed (name or class): Unknown, Post-Transisiton metal, Reactive nonmetal.

New category (name or class): Other metal, Other Nonmetal, Halogen

• Reordering Category scheme (Nov 2020)

Rationale

User talk:Double sharp § #The 2010 option ([1])

Color set

{{Wikipedia:WikiProject Elements/PTG/table-setlist|set=2020|AM|AEM|LN|AN|TM|OM|MOID|ONONM|HAL|NG}}

Blind PT

Periodic table (WP:PTG, set="2020")
	☐	☐	☐					☐	☐	☐	☐	☐	☐	☐	☐	☐	☐
◯
◯
◯
◯
◯
◯
◯

Contrasts

PTG: Contrast check for colorset "2020" ({{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=DESCR }}) · Set definition: PTG/set/2020
sort	name	bg	font	ratio	conf w3c		lum [0–1]	Hue [0–360]		HSL Sat [0–1]	HSL Lum [0–1]		HSV Sat [0–1]	HSV Val [0–1]	RGB dec [0–255]	note
																​
name=AM}}	AM	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AM |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0
name=AEM}}	AEM	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AEM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AEM |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0
name=LN}}	LN	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=LN |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=LN |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0
name=AN}}	AN	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AN |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AN |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0
name=TM}}	TM	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=TM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=TM |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0
name=OM}}	OM	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=OM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=OM |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0
name=MOID}}	MOID	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=MOID |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=MOID |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0
name=ONONM}}	ONONM	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=ONONM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=ONONM |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0	C, P, S, Se
name=HAL}}	HAL	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}					0	​	0	0		0	0	0-0-0	I, At
name=AM}}	AM	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AM |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}													wl blue
name=AEM}}	AEM	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AEM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AEM |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=LN}}	LN	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=LN |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=LN |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=AN}}	AN	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AN |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AN |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=TM}}	TM	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=TM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=TM |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=OM}}	OM	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=OM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=OM |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=MOID}}	MOID	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=MOID |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=MOID |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=ONONM}}	ONONM	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=ONONM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=ONONM |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=HAL}}	HAL	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=NG}}	NG	set=2020|name=wl |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=NG |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=NG |default=fffffe}}	set=2020|name=wl |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=wl |default=000001}}
name=AM}}	AM	set=2020|name=black |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AM |default=fffffe}}	set=2020|name=black |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=black |default=000001}}													solid=black
name=TM}}	TM	set=2020|name=somliq |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=TM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=TM |default=fffffe}}	set=2020|name=somliq |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somliq |default=000001}}													Hg
name=HAL}}	HAL	set=2020|name=somliq |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}	set=2020|name=somliq |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somliq |default=000001}}													Br
name=ONONM}}	ONONM	set=2020|name=somgas |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=ONONM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=ONONM |default=fffffe}}	set=2020|name=somgas |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somgas |default=000001}}													N, O
name=HAL}}	HAL	set=2020|name=somgas |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}	set=2020|name=somgas |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somgas |default=000001}}													F, Cl
name=NG}}	NG	set=2020|name=somgas |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=NG |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=NG |default=fffffe}}	set=2020|name=somgas |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somgas |default=000001}}													noble gases
name=AN}}	AN	set=2020|name=somunk |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AN |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=AN |default=fffffe}}	set=2020|name=somunk |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somunk |default=000001}}													Fm-Lr
name=TM}}	TM	set=2020|name=somunk |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=TM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=TM |default=fffffe}}	set=2020|name=somunk |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somunk |default=000001}}													Rf-Cn
name=OM}}	OM	set=2020|name=somunk |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=OM |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=OM |default=fffffe}}	set=2020|name=somunk |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somunk |default=000001}}													Nh-Lv
name=HAL}}	HAL	set=2020|name=somunk |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=HAL |default=fffffe}}	set=2020|name=somunk |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somunk |default=000001}}													Ts
name=NG}}	NG	set=2020|name=somunk |default=000001}}; background:#{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=NG |default=fffffe}}" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=NG |default=fffffe}}	set=2020|name=somunk |default=000001}};" | #{{Wikipedia:WikiProject Elements/PTG/set|set=2020|name=somunk |default=000001}}													Og

Hex neighborhood

category	number of borders
AM	2
AEM	4
LN	3
AN	3
TM	4
OM	3
MOID	3
ONONM	3
HAL	4
NG	1
(AM in LeftStep)	3
(ONONM in LeftStep)	4
(NG in LeftStep)	3

• 10 colors, no Unk, 2 repetitions

Issues

• No categories except ONONM, HAL, & NG meet AAA
• AM and AN do not meet AA
• PTM/MOID are too similar
• SoM should have other distinguishers in addition to, or instead of, color.