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Reading the Periodic Table

Reading the Periodic Table. A way of organizing & classifying elements according to their PROPERTIES. Arranged in rows and columns. Columns. The vertical (up and down) columns of the periodic table (there are 18) are called groups or families .

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Reading the Periodic Table

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  1. Reading the Periodic Table

  2. A way of organizing & classifying elements according to their PROPERTIES • Arranged in rows and columns

  3. Columns • The vertical (up and down) columns of the periodic table (there are 18) are called groups or families. • Elements in the same group or family have similar characteristics or properties.

  4. Rows • The horizontal rows of the periodic table are called periods. • Elements in a period are not alike in properties. • The first element in a period is usually an active solid, and the last element in a period is always an inactive gas.

  5. Rows • Atomic size (number of protons) decreases from left to right across a period. • Atomic mass (number of protons) increases from left to right across a period.

  6. Rows • Electrons are added one at a time moving from left to right across a period • The electrons of the outermost shell have increasingly strong nuclear attraction, so the electrons become closer to the nucleus • Ionization energy increases • Electronegativity increases

  7. Quick Review of electron shells Valence electrons are the outermost electrons in an atom.

  8. Rows • Metals are on the left • Non-metals are on the right

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