Atom, A small particle that is the building block of matter, Chemical Formula, A group of chemical symbols and numbers that represent the elements and the number of elements that make up a compound elements, Chemical Symbol, One or two letters that represent an element, Compound, A substance containing two or more different elements connected together, Element, A substance that consists of only one type of atom, Molecule, Two or more atoms that are held together and act as a unit, Periodic Table, A chart of the elements arranged into rows and columns according to their physical and chemical properties

Atomic Structure

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