{'fraction_non_alphanumeric': 0.010687022900763359, 'fraction_numerical': 0.012213740458015267, 'mean_word_length': 4.559322033898305, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
IUPAC and the Periodic Table

Abstract The Periodic Table is now regarded as such a fundamental part of current chemical research and teaching that it is salutary to learn that this prominence is a relatively recent development. IUPAC was established in its present form in 1919, but the roots of the Table go back much further. The general realization of the value of the Periodic Table to rationalize and teach chemistry has only come about since the new flowering of inorganic chemistry, which can be dated to the 1960s. Today the most popular form of the Table and its updating and dissemination owe much to IUPAC, though this was not always the case.