The elements of in a column of the periodic table are called groups or families.

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Periodic Table Organization

• The elements of in a column of the periodic table
  are called groups or families.
• They share similar chemical properties.

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Group 1 metals

• Called alkali metals
• react violently/extremely reactive

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Group 2 metals

• Called alkaline earth metals
• React slowly with water or not at all/reactive
• Not found free in nature

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Group 3 12 transitition metals

• Bridge the gap between more reactive Group 1 2
  metals and the less reactive elements
• Zig Zag line separates metals from non-metals
• Elements along the line are called metalloids

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Group 13 16 Non-metals

• Many are gasses at room temperature
• They tend to be dull
• Poor conductors
• Have properties opposite of metals

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Group 13 16 Post-Transition Metals

• Usually solid, but softer than other metals
• Opague
• Higher electronegativity than other metals

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Group 17 Halogens

• Very reactive nonmetals
• Not found free in nature
• Most reactive nonmetals

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Group 18 Noble Gases

• Complete outer shell
• Inert -gt non reactive

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Periods Properties

• The elements in horizontal rows are called
  periods.
• Elements in the period all react differently.
  However, their properties gradually change from
  left to right in the table.
• The last element in a period is always a non
  reactive gas.

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