Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The principle stating that the properties of the elements recur periodically as their atomic numbers increase.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry The
principle thatchemical properties of theelements areperiodic functions of theiratomic numbers
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun (chemistry) the principle that chemical properties of the elements are periodic functions of their atomic numbers
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