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Trivia.com

A nanometer is the size of about 10 hydrogen atoms laid side by side

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A nanometer is the size of around 5 atoms placed end to end

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Atoms are in constant flux in the human body --- every year over 98% of atoms in your body are replaced

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The atom is represented by a mere 92 unique naturally occurring elements like the 26 letters of our alphabet encompasses our communicative existence

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A 52 card deck has more permutations than there are atoms in our Galaxy

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The atom is mostly empty space --- if it were the size of a football stadium, the nucleus be the size of a small marble on the 50-yard line

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Atoms are so tiny that a speck of dust is half way between its size and the size of the earth

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Atoms have a lot of empty space --- Remove all the empty space in the atoms of all humans on earth and we could fit into an apple

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atoms are small --- you'd need 2 million hydrogen atoms to cover the period at the end of this sentence.

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If an atom were the size of the Earth, the proton at its center would be about 600 feet across

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Atoms are largely empty space --- If you took out all the empty space in our atoms, the human race could fit in the volume of a sugar cube

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Atoms are small --- there are 8 times as many atoms in a teaspoonful of water as there are teaspoonfuls of water in the Atlantic ocean

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A nucleus is small --- if an atom were the size of a football stadium, the nucleus would be the size of a marble surrounded by vast regions of empty space

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Atoms are so tiny that a sheet of paper is a million atoms thick

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If an apple were blown up to the size of the earth, an atom in that apple would be the size of the original apple

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If helium atoms were the size of a period [.] then gerbils would be the size of the earth

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Atoms are different sizes -- the largest (cesium) is roughly nine times bigger than the smallest (helium)

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An atoms thickness, compared to a piece of paper, is like comparing that same piece of paper's thickness to a 30 story building (328 feet)

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Atoms are so tiny that an atom compared to a small person is similar in size to that small person compared to the sun

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One second is technically the duration of 9,192,631,770 oscillations of a Caesium 133 atom's outermost electron.