from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry A
tabular chartof the chemical elementsaccording to their atomic numbersso that elements with similar propertiesare in the same column.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun (chemistry) a tabular arrangement of the chemical elements according to atomic number as based on the periodic law
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