How big are atoms.

Q5. How big are atoms?
Atoms are about 10 millionth of a millimeter across and weight 100 trillionths of a trillion of a gram. The smallest atom is hydrogen; the biggest is meitnerium.( since they are so small, atoms are measured in terms of ‘moles’, which is a quantity of the substance containing the same number of atoms as 12 grams of a form of carbon called Carbon 12).

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