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they don't fall in one group

they are

Metalloids

non-metals

metals

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11y ago
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10y ago

Probable you think to lanthanides and actinides; but the calling of groups with a and b is obsolete and abandoned by IUPAC from many years.

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14y ago

Transition metals.

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Q: What is the family name for the elements that fit between groups 2a and 3b?
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