Patterns in the Periodic Table

Learning Goals

• I will be able to recognize groups of the periodic table.

Chemical Families

• CHEMICAL FAMILY: a column of elements on the periodic table with similar physical and chemical properties

• Each family has its own name

• Columns are numbered left to right

What are the Families?

• ALKALI METAL: element in group 1 of the periodic table

• Shiny, silvery, and soft

• Highly reactive, so often combine with other elements and compounds

• Examples: Salt (NaCl), baking soda (NaHCO3), potassium (bananas!)

What are the Families?

• ALKALINE EARTH METAL: an element in group 2 of the periodic table

• Shiny, silvery, not as soft as group 1

• Not as reactive as group 1

• Examples: calcium (milk!), fireworks (bright flames)

What are the Families?

• HALOGENS: elements in group 17 of the periodic table

• Can be gases (F, Cl), liquids (Br) or solids (I, At)

• Very reactive, so often form compounds, especially with group 1

• Can be poisonous

• Examples: Chlorine (pools, gas), Halogen (lamps)

What are the Families?

• NOBLE GASES: element in group 18 of the periodic table

• Colourless, tasteless, odourless

• Unreactive

• Non-toxic (except for radon)

• The diff noble gases glow diff colours when an electrical current passes through them

• Examples: Helium (balloons), Neon (signs)

Periodic Trends

• Elements in the same row also show trends

• PERIOD: a row in the periodic table

• Reactivity: group 1 more reactive than group 2, group 17 more reactive than group 16

Learning Goals Revisited

• I will be able to recognize groups of the periodic table.

Please complete …

• Pg. 225 #1, 2, 8, 9, 10

• Metal Detective Lab Activity