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How many atoms are there in the observable universe?



All matter in the universe – no matter how big, small, young or old – consists of atoms.

Each of these building blocks consists of a positively charged nucleus composed of protons and neutrons, and negatively charged electrons orbiting. The number of protons, neutrons and electrons that an atom has determines which element it belongs to the periodic system and affects how it reacts with other atoms around it. All you see around you is just a configuration of different atoms interacting with each other in unique ways.


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