2009families
T HE P ERIODIC T ABLE Groups are the vertical columns in the periodic table. The group number is located above each column. Periods are the horizonta.
Atoms Smallest part of all matter Made of smaller particles Dalton Rutherford Thompson Chadwick Bohr.
Hydrogen is a NONMETAL despite its placement on the left hand side of the P.Table. Metals-Left of “staircase” Nonmetals-Right of “staircase” Alkali.
Periodic Table
