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The INTERNET Database of Periodic Tables

There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Mark R. Leach Ph.D.

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Year:  1969 PT id = 1273

Martin's Crystal Structure Periodic Table

Ref: Martin JW 1969, Elementary Science of Metals, Wykeham Publications, London

René Vernon writes:

Note the unusual placement of La-Ac in two places, under Y and before Ce-Th. On another aspect, Martin writes:

"The non-metals, which occupy the top right-hand corner of the Periodic Table... form about one-sixth of all elements, and they are characterized by having melting-points and boiling points below about 500°C, and by having their solid and liquid phases not conducting electricity. About two-thirds of all elements are metals, and a further one sixth have properties intermediate between those of metals and non-metals."

His approach to the question of which elements are metals and non-metals, and which are intermediate may be the most useful "rough-and-ready" rubric I've seen. It is remarkable for its use of four criteria.

Perhaps we can then parse the elements as follows

Non-metals (16) = 15.5%
Fluids: H, N, O, F, Cl, Br; He, Ne, Ar, Kr, Xe, Rn 2
Solids: P, S, Se*, I

Intermediate (16) = 15.5%
Metalloids: B, Si, Ge, As, Sb, Te
Near metalloids: C, At 3
Sub-metalloids: Al, Ga, In, Tl; Sn, Pb; Bi; Po

Metals (71) = 68.9%
Be,^ Zn^
All the rest

^ Borderline intermediate

Dingle (2017, The Elements: An Encyclopedic Tour of the Periodic Table, Quad Books, Brighton, p. 101) puts the situation this way:

"...the gap between the two extremes [of metals and nonmetals] is bridged... by the poor metals, and... the metalloids – which, perhaps by the same token, might collectively be renamed the poor non-metals.

Redrawn by Vernon:

Thanks to René for the tip!

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