Talk:Chemical elements: Difference between revisions
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*I removed the old list that I commented out earlier and added a list sorted on atomic number.--[[User:Paul Wormer|Paul Wormer]] 10:29, 9 November 2007 (CST) | *I removed the old list that I commented out earlier and added a list sorted on atomic number.--[[User:Paul Wormer|Paul Wormer]] 10:29, 9 November 2007 (CST) | ||
== Molecules == | |||
The sentence: | |||
:''All matter around us (solids, liquids, and gases) are made up of atoms, either of one species (an element) or a combination of species (e.g., molecules, alloys).'' | |||
strongly suggests that a molecule necessarily consists of ''different'' elements. This is not true, of course, H<sub>2</sub>, N<sub>2</sub>, O<sub>2</sub> are counterexamples. | |||
Also I'm not certain that I agree with the definition "an element is a substance". The term "substance" implies a form of stability. However, when we speak of "elemental hydrogen" we don't mean H<sub>2</sub>, but ''atomic hydrogen'', which is highly unstable. Personally I would not call elemental hydrogen a "substance".--[[User:Paul Wormer|Paul Wormer]] 05:00, 12 June 2009 (UTC) | |||
Revision as of 23:01, 11 June 2009
If this is just to be an alphabetical list of elements, it looks more or less complete to me --Larry Sanger 09:52, 17 March 2007 (CDT)
I would prefer to prefix the atomic number and to see three columns (of lengths of about 37 entries): from Actinium to Gallium, from Germanium to Potassium and from Praseodymium to Zirconium (or close to this division). Is there somebody who can do this easily? --Paul Wormer 08:06, 27 October 2007 (CDT)
I put in a new HTML table (kept and commented out the old one). --Paul Wormer 09:12, 29 October 2007 (CDT)
- I removed the old list that I commented out earlier and added a list sorted on atomic number.--Paul Wormer 10:29, 9 November 2007 (CST)
Molecules
The sentence:
- All matter around us (solids, liquids, and gases) are made up of atoms, either of one species (an element) or a combination of species (e.g., molecules, alloys).
strongly suggests that a molecule necessarily consists of different elements. This is not true, of course, H2, N2, O2 are counterexamples.
Also I'm not certain that I agree with the definition "an element is a substance". The term "substance" implies a form of stability. However, when we speak of "elemental hydrogen" we don't mean H2, but atomic hydrogen, which is highly unstable. Personally I would not call elemental hydrogen a "substance".--Paul Wormer 05:00, 12 June 2009 (UTC)