Organize my grocery list so that I can be more efficient:

• Peanut butter• Milk• Ground beef• Cucumber• Frozen corn• Fish sticks• strawberries

• Bread• Frozen waffles• Cheese• Cheerios• Sliced ham• Ice cream

What are some of the ways you organized the grocery list?

• Alphabetical• Aisle• Frozen foods• Food groups• Animal/plant products• Processed/natural foods

The periodic table has a lot of information organized in different

patterns:• Periods – horizontal rows

- elements have the same number of electron shells

• Groups – vertical columns- elements in the same group have similar chemical properties

Staircase – separates metals and non-metals

Trend 1: Periods

Periods – horizontal rows- elements have the same number of electron shells- Periods go from 1 to 7

Periods

Trend 2: Groups or Families

• Groups – vertical columns

- Elements in the same group have similar chemical properties

- Groups go from 1 to 18

Groups

Families

• Families: Some groups are combined as they all act similarly.

Hydrogen• Family of one!• Sometimes acts like a metal• Sometimes acts like a non-metal

Alkali Metals• Group 1• Most reactive metals • Always combined with other substances in

nature• Ex: Li, Na, K

Alkaline Earth Metals• Group 2• Very reactive metals• Ex: Be, Mg, Ca

Transition Metals• Groups 3-12• Most common metals• Shiny• High melting points• Ex: Au, Ag, Cu, Co

Groups 13 to 16

• You are not responsible for the names of these families.

Halogens• Group 17• Most reactive non-metals• Ex: F, Cl, Br

Noble gases• Group 18• Very stable• Not reactive under normal conditions• Ex: He, Ne, Ar

Trend 3:Metals, Non-metals, Metalloids

• Staircase – separates metals and non-metals

Properties of Metals, Non-metals and Metalloids:Location State

(at room temperature)

Appearance Conductivity(heat and electricity)

Metals Left side of staircase

Solids (except Hg – liquid)

Shiny Good

Non- metals Right side of staircase

Some gases, some solids (except Br –liquid)

Not very shiny

Poor

Metalloids Directly surrounding staircase

Solids Either shiny or dull

May conduct electricity, poor for heat

Metal = greenNon-metals = yellowMetalloids = blue

Use your book or this slide to colour your own periodic table for reference: