Periodic table

How do you know the # of valence electrons? 
it tells you i  the periodic table near the elements

Where are metals found?
there found allover the the periodic table on the far out right of the chart


Where are nonmetals found?
nonmetals are found in the left of the periodic table

where does the atomic number tell  us  about each    element 

i think that its 

 ----in  the periodic table the metalloids are found in the stair case of the chart----


-------------------where the metalloids located??-------------------