(UTC) Interesting. Of course, current layout is the regular layout for periodic table(s). Do you have any example or source that switches these two (transpone)...

"the poorest of (recognised) poor metals". Gold has higher electronegativity in Pauling scale, forms auride ion but is not classified as metalloid or even...

no Pauling electronegativity is available (such as He, Ne, Ar, and the transactinides), my advice would be to substitute the Allen electronegativity, since...