Talk:Group 3 element/GA1

GA Review

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Reviewer: FREYWA 03:20, 27 June 2011 (UTC)

I've recently become engaged in strategic protein folding with Foldit, but I can prove that I'm not addicted to that by reviewing this article. Besides, the July GOCE drive is about to start, and I'm participating. Cheers! FREYWA 03:20, 27 June 2011 (UTC)

Review

GA review – see WP:WIAGA for criteria

1. Is it reasonably well written?

   A. Prose quality:

   B. MoS compliance for lead, layout, words to watch, fiction, and lists:

2. Is it factually accurate and verifiable?

   A. References to sources:

   B. Citation of reliable sources where necessary:

   C. No original research:

3. Is it broad in its coverage?

   A. Major aspects:

   B. Focused:

4. Is it neutral?

   Fair representation without bias:

5. Is it stable?

   No edit wars, etc:

6. Does it contain images to illustrate the topic?

   A. Images are copyright tagged, and non-free images have fair use rationales:

   B. Images are provided where possible and appropriate, with suitable captions:

7. Overall:

   Pass or Fail:

Comments

• Aren't most of these resolved already? A quick read through the article shows that most, if not all, of these points, are out of date. Lanthanum-138 (talk) 10:15, 6 July 2011 (UTC)

Issues

2b

• The separation of lutetium from ytterbium was first described by Urbain and the naming honor therefore went to him but neoytterbium was eventually reverted back to ytterbium and in 1949, the spelling of element 71 was changed to lutetium. (History)
• No experiments have been performed to create unpenttrium, unbiunium or any element that could be considered the next group 3 element; however, unbiunium is the element with the lowest atomic number that has not been tried to be created and thus has chances to be, while unpenttrium, unpentpentium or any other element considered if preceded by lawrencium is very unlikely to be created. (History)
• In their most commonly encountered tripositive ion forms, these elements do not possess any partially filled f-orbitals, thus continuing the scandium—yttrium—lanthanum—actinium trend, in which all the elements have relationship similar to that of elements of the calcium—strontium—barium—radium series, the elements' left neighbors in s-block. However, this is in disagreement with other d-block groups, in which group 3 lies as well, especially its right neighbors, group 4, in which zirconium, hafnium and rutherfordium share similar chemical properties and not showing a clear trend. (Group borders)
• These elements are the last in lanthanide and actinide series, respectively. Since the f-shell is nominally full in the ground state electron configuration for both of these metals, they behave most like other period 6 and period 7 d-block metals out of all the lanthanides and actinides, and thus exhibit the most similarities in properties with scandium and yttrium, similarly to other d-block groups. (Group borders)
• This sometimes is believed to be is the inclusion of all 30 lanthanide and actinide elements as included in group 3. Lanthanides, as electropositive trivalent metals, all have a closely related chemistry, and all show many similarities to scandium and yttrium, but they also show additional properties characteristic of their partially-filled f-orbitals which are not common to scandium and yttrium. Exclusion of all elements is based on properties of earlier actinides, which show a much wider variety of chemistry (for instance, in range of oxidation states) within their series than the lanthanides, and comparisons to scandium and yttrium are even less useful. However, these elements are destabilized, and if they were stabilized to match chemistry laws closer, they would be similar to lanthanides as well, and this does not correspond to the utmost elements of the series. (Group borders) FREYWA 03:21, 29 June 2011 (UTC)

1a

• Lanthanum continues the trend started by two lighter members in general chemical behavior, while lutetium behaves more similar to yttrium; /// the trend for period 6 transition metals to behave more similar to its higher periodic table neighbor is also seen in lutetium immediate neighbors, /// from hafnium, which is almost identical chemically to zirconium, to mercury, which is quite distant from cadmium but still share with it almost equal atomic size and some similar properties. This passage is messed up. /// indicates where I want a sentence break to be.
• History
  • Mendeleev made several predictions on yttrium upper neighbor, which he called eka-boron. Can this be reworded?
  • The missing element was discovered by Swedish chemist Lars Fredrik Nilson and his team, detected the element in the minerals euxenite and gadolinite and prepared 2 grams of scandium(III) oxide of high purity. No repeated words of the same meaning.
  • Nuclide ²⁵⁷103 was originally reported, but then this was reassigned to ²⁵⁸103. Where is the article?
  • The calculated electronic and filling the 5g-subshell should be stopped at element 138. Unclear.
• Characteristics
  • Chemical
    • Like other groups, the members of this family show patterns in its electron configuration, especially the outermost shells resulting in trends in chemical behavior. However, lawrencium is an exception, since its last electron is transferred to 7p_1/2 level due to relativistic effects. Wrong tense, no comma, should be the 7p_1/2 shell.
    • The remaining elements of the group (scandium, yttrium, lutetium) are quite reactive metals with high melting points (1541 °C, 1526 °C, 1652 °C), usually oxidized to +3 oxidation state, even through scandium and yttrium can form lower oxidation states (as well as lanthanum). I facepalm when I see this. The "quite" is puffery, the second issue is vague, the third should be consistent with the previous text.
• Group borders
  • There is a dispute whether lanthanum and actinium or lutetium and lawrencium should be included into group 3. Other d-block group are composed of four transition metals, and group 3 sometimes is considered to be as well. First one should be "in", second should be "is sometimes".
• Occurence
  • Scandium, yttrium, and lutetium the tend to occur together with other lanthanides (except promethium) tend to occur together in the Earth's crust, and are often harder to extract from their ores. Remove!
  • The abundance of elements in Earth's crust for group 3 is quite low — all elements in group are uncommon, the most abundant being yttrium, with abundance of approximately 30 ppm. Abundance of scandium is 16 ppm, while that of lutetium is about 0.5 ppm. Add an indefinite article and remove a comma for that. Then, merge the sentences.
• Production
  • Lutetium and scandium, both mostly produced in the form of oxides, rate at about 10 and 2 tonnes per year, respectively. Out of annual 2 tonnes of scandium, only 400 kg is mined during the year, while the rest is from stockpiles of Russia generated during the Cold War. Could you make this clearer?
• Biological chemistry
  • No group 3 has any documented biological role in living organisms.
  • Lutetium has no biological role as well, but it is found in even in the highest known organism, the humans, concentrating in bones, and to a lesser extend in the liver and kidneys. Redundant word and spelling error.
  • Lutetium salts are known to cause metabolism and they occur together with other lanthanide salts, similarly to the nature; the element is the least abundant in the human body of all lanthanides. Huh?
  • Human diets have not been monitored for lutetium content, so it is not known how much does human take in, but the estimations show the amount is about only several micrograms per year, all come from tiny amounts taken by plants. Reversed words. And then... FREYWA 09:27, 4 July 2011 (UTC)