Lanthanide contraction nu, periodic table-la atomic radius sudden-a kura varum phenomenon. Adhan consequences-a, lanthanum-ku appuram elements same size-ula irukkarathu, 4d and 5d elements similar properties, and separation difficult-a irukkarathu. But na en problem solve pannumbothu, consequences pathi nenaikka vida, contraction itself-aye clear-a puriyala nu tension aaguren. Chemistry sir homework vechu vandha, periodic trends padicha anga than da exact-a doubt varum!
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