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The last sentence of the 1st paragraph says {{tq|A metal may be a [[chemical element]] such as [[gold]], or an [[alloy]] such as [[stainless steel]], or a [[intermetallic compound|compound alloy]] such as [[nickel aluminide]].}} It seems to me that nickel aluminide is a poor choice as it could be any of three different substances. [[User:YBG|YBG]] ([[User talk:YBG|talk]]) 05:00, 11 August 2018 (UTC)
The last sentence of the 1st paragraph says {{tq|A metal may be a [[chemical element]] such as [[gold]], or an [[alloy]] such as [[stainless steel]], or a [[intermetallic compound|compound alloy]] such as [[nickel aluminide]].}} It seems to me that nickel aluminide is a poor choice as it could be any of three different substances. [[User:YBG|YBG]] ([[User talk:YBG|talk]]) 05:00, 11 August 2018 (UTC)
:Ta, I changed this to: "such as one of the nickel aluminides." [[User:Sandbh|Sandbh]] ([[User talk:Sandbh|talk]]) 07:57, 11 August 2018 (UTC)
:Ta, I changed this to: "such as one of the nickel aluminides." [[User:Sandbh|Sandbh]] ([[User talk:Sandbh|talk]]) 07:57, 11 August 2018 (UTC)
::I'm still bothered a bit by the three category names: the current scheme (element ... alloy ... compound alloy) makes the 3rd item seem like a subcategory of the 2nd. Maybe change to element ... alloy ... intermetallic compound or element ... alloy ... compound.
::And I'm uncertain of the order. The current order (element/alloy/compound) seems to go in historic order or perhaps from most common to least common. An alternative is to go from simplest to most complicated, i.e., element (pure) - compound (whole number ratio) - alloy (arbitrary ratio). Comments? [[User:YBG|YBG]] ([[User talk:YBG|talk]]) 08:33, 11 August 2018 (UTC)

Revision as of 08:33, 11 August 2018

Template:Vital article

No edit war

I don't want to start an edit war, but some of the alkali metals can be cut with a knife, which means they are soft. The reason why usually high melting-points is necessary is mercury, rubidium, gallium, and cesium are all liquid at or near room temperature. While the concept of high MP or low MP differs, everyone on the planet would agree that these are low in comparison to the melting points of other metals (eg. tungsten). Mercury's melting point is below 0C. All people would agree that that is low.

What metal oxides are basic? Most metal oxides are completely inert. Al2O3, SiO2, TiO, etc. Metal hydroxides are basic (NaOH, KOH), sure, but that's an entirely different animal.

Eric 22:34, 29 Jan 2005 (UTC)

I just want to add a little more about acidic/basic properties of metal oxides. Some metal oxides in their highest oxidation state are far not inert being extremely aggressive oxidizers (dangerous in handling!) and definitely acidic because they produce pH < 7 when mixed with water (or willingly soluble in alkali) e. g., CrO3, MoO3, WO3, V2O5, Mn2O7 unlike those of low oxidation state, which are neutral or even somewhat basic like TiO and PbO soluble in sulfuric acid. From another hand, TiO2 and Pb3O4 are soluble in molten NaOH. Thus, yes, basicity/acidity conception is hardly helpful for definition of what metals are, though nevertheless, it is true: most of metal oxides in their low oxidation states are basic or amphoteric. In general, the higher group number of an element in Periodic Table the less basic is the corresponding oxide. {Nick Moskalev, September 25, 2005}

The article does point out that the alkaline properties of metal oxides is a rule of thumb, not an absolute truth.

I have created a new metal-nonmetal periodic table.

Group # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Period
1
1
H 		2
He
2 3
Li 		4
Be
5
B 		6
C 		7
N 		8
O 		9
F 		10
Ne
3 11
Na 		12
Mg
13
Al 		14
Si 		15
P 		16
S 		17
Cl 		18
Ar
4 19
K 		20
Ca 		21
Sc 		22
Ti 		23
V 		24
Cr 		25
Mn 		26
Fe 		27
Co 		28
Ni 		29
Cu 		30
Zn 		31
Ga 		32
Ge 		33
As 		34
Se 		35
Br 		36
Kr
5 37
Rb 		38
Sr 		39
Y 		40
Zr 		41
Nb 		42
Mo 		43
Tc 		44
Ru 		45
Rh 		46
Pd 		47
Ag 		48
Cd 		49
In 		50
Sn 		51
Sb 		52
Te 		53
I 		54
Xe
6 55
Cs 		56
Ba 		71
Lu 		72
Hf 		73
Ta 		74
W 		75
Re 		76
Os 		77
Ir 		78
Pt 		79
Au 		80
Hg 		81
Tl 		82
Pb 		83
Bi 		84
Po 		85
At 		86
Rn
7 87
Fr 		88
Ra 		103
Lr 		104
Rf 		105
Db 		106
Sg 		107
Bh 		108
Hs 		109
Mt 		110
Ds 		111
Rg 		112
Cn

* Lanthanides 57
La 		58
Ce 		59
Pr 		60
Nd 		61
Pm 		62
Sm 		63
Eu 		64
Gd 		65
Tb 		66
Dy 		67
Ho 		68
Er 		69
Tm 		70
Yb
** Actinides 89
Ac 		90
Th 		91
Pa 		92
U 		93
Np 		94
Pu 		95
Am 		96
Cm 		97
Bk 		98
Cf 		99
Es 		100
Fm 		101
Md 		102
No

Element categories in the periodic table

rowspan=2 style="background:Template:Element color/Metals;" | Metals rowspan=2 style="background:Template:Element color/Other nonmetals;" | Other nonmetals

Unsigned - [1] 05:09, 3 December 2010 User:Wd930

Note: The colors used for this table have changed. See {{periodic table (metals and nonmetals)}}. -DePiep (talk) 14:49, 27 December 2012 (UTC)[reply]
Good work which does not seem to have found its way in the article until now. So I have just inserted the version cited by De Piep, with all elements to 118. Dirac66 (talk) 01:45, 30 June 2017 (UTC)[reply]

Semi-protected edit request on 8 November 2015

The following is intended for section 8 (Applications):

Metals can be doped with foreign molecules – organic, inorganic, biological and polymers. This doping entails the metal with new properties that are induced by the guest molecules. Applications in catalysis, medicine, electrochemical cells, corrosion and more have been developed. [1]

David Avnir (talk) 07:48, 8 November 2015 (UTC)[reply]

David Avnir (talk) 07:48, 8 November 2015 (UTC)[reply]

I've added a link above to dopant. YBG (talk) 21:54, 8 November 2015 (UTC)[reply]
Done Thank you. Inomyabcs (talk) 19:52, 2 December 2015 (UTC)[reply]

References

  1. ^ Avnir, David (2014). "Molecularly doped metals". Acc. Chem. Res. 47: 579–592. doi:10.1021/ar4001982.

Semi-protected edit request on 2 December 2015

Please change the mechanical properties listed on this page as they are incorrect metals are not Ductile they are "Often ductile" and are not always "strong" there for it should state "Often strong". Adam Sleigh (talk) 15:49, 2 December 2015 (UTC)[reply]

Not done for now: I couldn't find the word strong in the article. As for ductile, in the lead it states, "Metals are generally malleable - as well as fusible and ductile." The word generally in this case would mean the same as often. There may be room to make it a little clearer, so if you have any suggestions on how to improve or rewrite it, please feel free to reactivate the request with citable sources and in the format "Change XXX to YYY". Thanks. Inomyabcs (talk) 19:42, 2 December 2015 (UTC)[reply]

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What is a metal?

There does not appear to be an actual definition of what a metal is anywhere in the article. The periodic table is divided into metals, metalloids Andy nonmetals, so surely there is a definition too explain the difference. -mattbuck (Talk) 20:08, 30 December 2017 (UTC)[reply]

There's no definitive definition. The question is covered at Metalloid#Definitions and Dividing line between metals and nonmetals. William Avery (talk) 19:59, 31 December 2017 (UTC)[reply]

I edited and refined the lead [excuse the unintentional pun] section to address this question. Sandbh (talk) 12:28, 3 August 2018 (UTC)[reply]

More lead refining

The last sentence of the 1st paragraph says A metal may be a chemical element such as gold, or an alloy such as stainless steel, or a compound alloy such as nickel aluminide. It seems to me that nickel aluminide is a poor choice as it could be any of three different substances. YBG (talk) 05:00, 11 August 2018 (UTC)[reply]

Ta, I changed this to: "such as one of the nickel aluminides." Sandbh (talk) 07:57, 11 August 2018 (UTC)[reply]
I'm still bothered a bit by the three category names: the current scheme (element ... alloy ... compound alloy) makes the 3rd item seem like a subcategory of the 2nd. Maybe change to element ... alloy ... intermetallic compound or element ... alloy ... compound.
And I'm uncertain of the order. The current order (element/alloy/compound) seems to go in historic order or perhaps from most common to least common. An alternative is to go from simplest to most complicated, i.e., element (pure) - compound (whole number ratio) - alloy (arbitrary ratio). Comments? YBG (talk) 08:33, 11 August 2018 (UTC)[reply]
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