Difference between revisions of "Atom"
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| − | An '''atom''' is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every [[solid]], [[liquid]], [[gas]] and [[plasma]] is composed of neutral or ionized atoms. Atoms are extremely small: typical sizes are around 100 | + | An '''atom''' is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every [[solid]], [[liquid]], [[gas]] and [[plasma]] is composed of neutral or ionized atoms. Atoms are extremely small: typical sizes are around 100 [[picometre]]s (a ten-billionth of a meter, in the short scale). |
==References== | ==References== | ||
Latest revision as of 17:47, 5 March 2020
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An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas and plasma is composed of neutral or ionized atoms. Atoms are extremely small: typical sizes are around 100 picometres (a ten-billionth of a meter, in the short scale).
