atomic number 8
ato·mic·num·ber
noun
1.
a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth''s crust
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WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.