Post-transition Metals
Post-transition metals or poor metals are terms applied to the metallic elements in the p-block of the periodic table. Post-transition metals are located to the right of the transition elements on the periodic table.
Post-transition metals are:
Post-transition metals are the metallic elements which follow the completion of each d-shell.
Their melting and boiling points are generally lower than those of the transition metals and their electronegativity higher, and they are also softer.
They are distinguished from the metalloids by their significantly higher boiling points and conductivity in the same period.
Metallic characters decreases across each Post-transition metal period and generally increases down the groups.
Ionisation energies are higher than for corresponding pre or early transition metals, and zig-zag down the group.
Uses of post-transition metals:
| post-transition metals | Uses |
|---|---|
| gallium (Ga) | semiconductors |
| indium (In) | alloys, semiconductors |
| tin (Sn) | tins, anti-fouling paint, solder alloys |
| thallium (Tl) | used as pesticide |
| lead (Pb) | alloys, solder, roofing, petrol additive |
| bismuth (Bi) | alloys, drugs, nuclear synthesis |