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The Periodic Table

Discover the patterns and organization of the periodic table. Learn about metals, metalloids, and non-metals, and how elements are classified based on their atomic number and properties.

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The Periodic Table

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  1. The Periodic Table Understanding the Periodic Table of Elements

  2. Mendeleev: Discovered a set of patterns that helped him organize Repeating Order Metals, Metalloids, Non-Metals *Except for Hydrogen* Elements are made of only One kind of Atom • Symbols have either one or two letters • The first letter of each symbol is a capital letter • The second letter is a lowercase letter

  3. What is the Periodic Table? • a table of the chemical elements in which the elements are arranged by order of increasing Atomic Number, which is also the # of protons • Horizontal Rows – Periods (7) • Vertical Columns – Groups (18) can also be called “Families” • An element’s properties can be predicted from its location in the periodic table

  4. GroupsPeriods Elements in the same Group have similar properties Elements in the same Periods have the same # of orbitals

  5. Reading the Periodic Table

  6. Atomic Number = # of protons = # of electrons Atomic Mass = # of protons + # of neutrons

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