Post-Transition Metals & Metalloids

Between the transition metals and the non-metals lies a fascinating region of the periodic table. The post-transition metals (sometimes called "poor metals" or "other metals") and the metalloids bridge the gap, exhibiting properties that are intermediate between the two extremes.

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Post-Transition Metals

Post-transition metals are found in groups 13–16 of the periodic table. They are softer, have lower melting points, and are poorer conductors compared to transition metals. However, they are still metallic in character.

Element	Symbol	Atomic Number	Group	Melting Point (°C)
Aluminium	Al	13	13	660
Gallium	Ga	31	13	30
Indium	In	49	13	157
Thallium	Tl	81	13	304
Tin	Sn	50	14	232
Lead	Pb	82	14	327
Bismuth	Bi	83	15	271

Aluminium (Al, Z = 13)