Periodic Table

  • periodic law: chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights or atomic numbers

  • Rows in the periodic table are called periods

  • Every element in the periodic table has similar properties

  • The periodic table is arranged by the number of increasing atomic number of the protons in the elements nucleus

  • There are 7 periods in the periodic table

  • the two groups in the periodic table are the Main Elements(A) and the Transitional Elements(B)

  • # of valence electrons in A is more predictable than B

  • the column/group of the periodic table is the # of valence electrons

  • the row/period of the periodic table is the # of energy shells

Families in the periodic table

  • Alkai Metals

  • Alkaline Earth Metals

  • Metals

  • Non Metals

  • Metalloids

  • Inner Transition Metals

  • Noble Gases