Reading the Periodic Table

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1. Slide 1

   Hook: Why do chemists use a table?

   • The periodic table maps all known elements by repeating patterns.
   • Its layout helps predict how elements behave.

2. Slide 2

   Structure: periods and groups

   • Rows are called periods and show repeating patterns across.
   • Columns are groups; elements in a group share chemical behavior.

3. Slide 3

   What each element block represents

   • An element's position tells about electron arrangement and properties.
   • Atomic number increases across the table from left to right.

4. Slide 4

   Key trends to predict properties

   • Atomic radius generally decreases left to right across a period.
   • Atomic radius increases down a group.
   • Ionization energy and electronegativity generally increase left to right.

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