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The best way to find yourself is to lose yourself in the service of others.
Gandhi
The Periodic Table
"It's here, right under your nose!"
"Just arrange the whole thing in rows."
"Put hydrogen here,"
Dmitri would cheer,
"And tungsten down by your toes."
Devlin Gualtieri
PERIODIC TABLE - an organizational system for elements. Elements are arranged in rows going from right to left called Periods and columns going up and down called Families or Groups .
Elements in the same period have the same number of energy levels.
The period number is the same as the number of energy levels
Atoms get more massive as you move from left to right across the periodic table
The atomic radii decreases as you move left to right across the periodic table
Group I or Alkali metals - Elements whose atoms have 1 outer-shell electron; they are very reactive
Group II or Alkaline Earth Metals - Elements whose atoms have 2 outer-shell electrons
Group III - Elements whose atoms have 3 outer-shell electrons
Group IV - Elements whose atoms have 4 outer-shell electrons
Group V - Elements whose atoms have 5 outer-shell electrons
Group VI - Elements whose atoms have 6 outer-shell electrons
Group VII or Halogens - Elements whose atoms have 7 outer-shell electrons
Group 0, sometimes called group 8 or Noble Gases - Elements whose atoms have full outer shells so they are very unreactive.