⚛️ Atoms

Facts About Atoms: The Empty Building Blocks

Atoms are 99.9999999% empty space. Solid matter is mostly nothing — held together by forces, not stuff.

30 FactsVerifiedA FactFacts Post

An atom's nucleus contains essentially all of its mass but takes up roughly one trillionth of its volume. If an atom were scaled up to the size of a football stadium, the nucleus would be a marble at the 50-yard line. Everything else is empty.

What makes solid matter solid isn't density — it's the electromagnetic forces between atoms. When you push on a table, your atoms aren't touching the table's atoms; their electron clouds are repelling each other.

These verified facts cover atomic structure, isotopes, fundamental particles, and the strange facts that emerge when you zoom in far enough that classical physics stops applying.

Below: every fact from our verified archive that touches this topic. Each is independently sourced; click through to its dedicated page.

01
Science

Atoms are made of protons, neutrons, and electrons.

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02
Science

There are more possible chess games than atoms.

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03
Science

Your atoms have likely been part of many other living things before you.

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04
Science

The atoms in your body are mostly empty space.

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05
Science

Your atoms were created inside exploding stars.

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06
Science

There are more possible games of chess than atoms in the observable universe.

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07
Science

There are more atoms in a glass of water than glasses of water in all Earth's oceans.

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08
Science

Your atoms are ancient.

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09
Science

A single human brain contains more possible connections than there are atoms in the Milky Way galaxy.

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10
Science

There are more possible unique 52‑card deck shuffles than there are atoms on Earth.

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11
Science

The atoms in your body will likely exist long after the Earth is gone.

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12
Science

The atoms that make up your body are replaced over time, meaning you are physically not the same person you were years ago.

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13
Science

There are more atoms in a glass of water than glasses of water in Earth's oceans.

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14
Science

You are made of atoms that were forged inside ancient stars.

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15
Science

You are breathing atoms that were once inside ancient dinosaurs.

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16
Science

Most of the atoms in your body are empty space.

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17
Science

You never actually touch anything because atoms repel each other.

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18
Science

There are more possible unique passwords than atoms on Earth.

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19
Science

You are made from atoms that existed long before Earth formed.

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20
Science

Your body contains atoms formed in ancient stars.

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21
Science

If you removed all the empty space from atoms in the human body, all of humanity could fit in a sugar cube.

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22
Science

Every atom in your body was forged inside a star.

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23
Science

There are more possible games of chess than atoms in the observable universe.

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24
Science

There are more possible iterations of a game of chess than there are atoms in the known universe.

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25
Science

If you removed all the empty space from atoms in the human body, all of humanity would fit in a sugar cube.

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26
Science

There are more atoms in a grain of sand than there are grains of sand on all of Earth's beaches.

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27
Science

There are more possible iterations of a chess game than there are atoms in the observable universe.

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28
Science

Every atom in your body older than hydrogen was forged inside a dying star.

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29
Science

There are more possible games of chess than there are atoms in the observable universe.

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30
Science

There are more atoms in a glass of water than there are glasses of water in all of Earth's oceans.

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