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- Key People:
- Frederick Soddy
- Kasimir Fajans
- Related Topics:
- branching
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displacement law
physics
displacement law, in physics, any of the statements (originally formulated in 1913) that radioactive decay produces daughter atoms whose position in the periodic table of the chemical elements is shifted from that of their parents: two lower for alpha decay and one higher for negative beta decay. See radioactive series.

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