Article on other languages:
- Blok_(Periodieketabel)
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- 元素のブロック
- Blokkene_i_periodesystemet
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- தனிம_அட்டவணை_எதிர்மின்னி_வலயம்
- บล็อกในตารางธาตุ
- 元素分区
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A block of the periodic table of elements is a set of adjacent groups. The respective highest-energy electrons in each element in a block belong to the same atomic orbital type. Each block is named after its characteristic orbital; thus, the blocks are:
The block names (s, p, d, f, g, h,...) are derived from the quality of the spectroscopic lines of the associated atomic orbitals: sharp, principal, diffuse and fundamental, the rest being named in alphabetical order. Blocks are sometimes called families.
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