Related terms:
triads
meyer
moseley
iodine
atomic
metals
valence
sulfur
tellurium
isotopes
predicted
elements
atomic weight
chemical
proposed
atomic number
purification
dmitri mendeleev
discovery
chemistry
russian
periodic table
properties
chemical element
chemical elements
chemical properties
classical element
Wikipedia sources:
Dmitri Mendeleev
Hafnium
Periodic table
History of the periodic table
Chemical element
History of chemistry
Context for words:
mendeleev
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