What do the period/row number say about the elements
The number (left hand side) tellls you the number of shells that element has
Ex - hydrogen 1
Ex- carbon 2
What do the groups/colums share about the elements
of electrons in valence shell
What is the most reactive chemical family
Alkali metals
Group 1
Name all chem families
Group 1 - alkali metals
Group 2 - alkaline earth metals
Groups 3-12 - transition metals
Group 17 - halogens
Group 18 - noble gasses
Where are metals found
Left and center of the table
Where are non metals found
Right side
Where are metaloids found
Along the staircase line (boron, silicon, arsenic. Etc)
What is a metaloid
Has properties of a metal and nonmetal
Periods (rows):
number of electron shells
Groups/families (columns)
number of valence electrons
Top 3 reactive
Alkali
Halogens
Alkaline earth
2–3 clear properties of metals
Good conductors of heat and electricity
Shiny (lustrous)
Malleable and ductile (can be bent or stretched)
2–3 clear properties of non metals
Poor conductors of heat and electricity
Usually dull (not shiny)
Often brittle when solid (break easily
2–3 clear properties of metaloids
Have properties of both metals and non-metals
Are semiconductors (conduct electricity only under certain conditions)
Usually shiny but brittle
