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Ca3+

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"In fact Ca3+ has an ionisation enthalpy so high that it rarely occurs naturally."

Are you sure? I never, ever heard of naturally occurring Ca3+! Sounds suspicious to me... --malbi

I suspect this is true that it never occurs naturally. I think this paragraph should be reworked; it's too much about calcium and group II and not enough about transition metals. Olin
I went and revised it. Olin

The periodic table of the transition elements

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Group 3 (III B) 4 (IV B) 5 (V B) 6 (VI B) 7 (VII B) 8 (VIII B) 9 (VIII B) 10 (VIII B) 11 (I B) 12 (II B)
Period 4 Sc 21 Ti 22 V 23 Cr 24 Mn 25 Fe 26 Co 27 Ni 28 Cu 29 Zn 30
Period 5 Y 39 Zr 40 Nb 41 Mo 42 Tc 43 Ru 44 Rh 45 Pd 46 Ag 47 Cd 48
Period 6 L Hf 72 Ta 73 W 74 Re 75 Os 76 Ir 77 Pt 78 Au 79 Hg 80
Period 7 A Rf 104 Db 105 Sg 106 Bh 107 Hs 108 Mt 109 Ds 110 Rg 111 Cn 112

Orphaned references in Transition metal

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I check pages listed in Category:Pages with incorrect ref formatting to try to fix reference errors. One of the things I do is look for content for orphaned references in wikilinked articles. I have found content for some of Transition metal's orphans, the problem is that I found more than one version. I can't determine which (if any) is correct for this article, so I am asking for a sentient editor to look it over and copy the correct ref content into this article.

Reference named "PTSS":

  • From Periodic table: Scerri, pp. 392−401
  • From Period 1 element: Eric Scerri. 2020, The Periodic Table, Its Story and Its Significance, 2nd edition, Oxford University Press, New York, ISBN 978-0190914363. pp. 392–401, 407–420.

I apologize if any of the above are effectively identical; I am just a simple computer program, so I can't determine whether minor differences are significant or not. AnomieBOT 18:23, 24 December 2022 (UTC)[reply]