The Periodic table block reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Periodic table block

In the periodic table, the areas known as blocks are named after atomic orbitals.

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Names of periodic table blocks:

• s-block
• p-block
• d-block
• f-block
• g-block

Some blocks contain several periodic table groups (eg the s-block contains groups 1 and 2); others correspond to chemical series.

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