HyperDic: atomic_number_54

English > 1 sense of the expression atomic number 54:
NOUNsubstanceatomic number 54, xenon, Xea colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
English > atomic number 54: 1 sense > noun 1, substance
MeaningA colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts.
Synonymsxenon, Xe
Broaderchemical element, elementAny of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
noble gas, inert gas, argononAny of the chemically inert gaseous elements of the helium group in the periodic table
Substance ofairA mixture of gases (especially oxygen) required for breathing
Spanishnúmero atómico 54, Xe, xenon, xenón
Catalannúmero atòmic 54, Xe, xenó

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