The periodic table is a tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and recurring chemical properties. Elements are listed in order of increasing atomic number.
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Atomic Number: This is the number of protons found in the nucleus of an atom. It defines the identity of an element.
Element Symbol: This is a one or two-letter abbreviation that represents an element on the periodic table. For example, "H" stands for Hydrogen and "O" stands for Oxygen.
Group (Periodic Table): A column in the periodic table that contains elements with similar properties due to having the same number of valence electrons.