ElementsElements

Element Pure substances; cannot be separated into simpler substances

Periodic Table Organizes elements by physical and chemical properties.

Pair/Share What are the 3 main “groups” on the Periodic Table? (Hint: You learned this is 6 th /7 th grade) Can you name some characteristics of each group?

Periodic Table The periodic table organizes elements by physical and chemical properties. DENSITYDENSITY M. E. L P T O I N G T M P E O L I T N I T N. G. REACTIVE

Organized by groups Columns Numbered (How many groups are there on the PT? ) Valence electrons Family – React the same

Group 18 of the periodic table Defining Characteristic: They do not combine with other elements Noble Gases Example - Noble Gases

Organized by periods horizontal rows (how many periods are there?) atomic number increases from left to right

Pair/Share What are 3 new ways you have learned that the Periodic Table is organized?

Element Cube 4 pieces of information: * Atomic Number – No two are the same! * Element Symbol (abbreviation) -ALWAYS starts with a capital letter -Has only 1 capital letter; everything else is lower case! * Element Name * Atomic Mass (what is MASS???) _When using this number, always round!