Periodic Table of Elements
Elements are the building blocks of matter. They are the simplest pure substances, composed of only one type of atom, and combine to form all the diverse substances in the universe.
Matter is defined as anything that occupies space and has mass, while elements are fundamental substances that cannot be broken down into simpler substances by ordinary chemical reactions, serving as the basic building blocks of all matter.
The periodic table is just for baryonic matter made up of protons, neutrons, and electrons. Anything made out of other subatomic particles won't make it into reddit
we need to add to this page also that ? is broken

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