[tex]\boxed{blue}{\green{QUESTION}}[/tex]
[tex]\colorbox{blue}{\green{How\:find\: the\: groups\: and \:periods \:of\: an\: Element}}[/tex]
[tex]\colorbox{blue}{\green{How\:find\: the\: groups\: and \:periods \:of\: an\: Element}}[/tex]
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The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.