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 picometers (a ten-billionth of a meter, in the short scale). read more
Spoiler: Very small THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US: Stephen Bassett, Paul Kuhns, Opal Hartbower, Andrzej Rejman read more