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lanthanide contraction
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has an article on:
lanthanide contraction
Wikipedia
Noun
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lanthanide
contraction
(
plural
lanthanide contractions
)
(
chemistry
,
physics
)
the progressive
decrease
in the
radii
of
atoms
of the lanthanide
elements
as the
atomic number
increases
; evident in various
physical
properties
of the elements and their
compounds
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en:Chemistry
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