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10.2 – District 2: Periodic Table and Trends Notes Key Points Define the following terms: Atomic Number – Atomic Mass – Group – Period – The Periodic Table of Elements The Periodic Table is arranged by increasing __________________________ Fill in the following table: Group Group Number Common Properties Alkali Metals Transition Metals Alkaline Earth Metals Halogens Noble Gases List the common properties of metals: List the common properties of non-metals: Metals, Non-metals, and Semimetals List the common properties of semimetals: Explain what the staircase is and how it helps to locate metals, non-metals, and semimetals on the Periodic Table. Define: Ionization Energy – Describe the trends for ionization energy on the Periodic Table Ionization Energy What is nuclear attraction and how does it explain the trends in ionization energy? Define: Electronegativity – Describe the trends for electronegativity on the Periodic Table Electronegativity What is nuclear attraction and how does it explain the trends in electronegativity? Define: Atomic Radius – Describe the trends for atomic radius on the Periodic Table Atomic Radius What is nuclear attraction and how does it explain the trends in atomic radius?