The vertical rows in this table indicate that the elements in a particular row are all part of a family of elements sharing certain similarities.
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Do you mean groups (veritcal) or periods (horizontal)? Groups are organized in a way to show the number of valence electrons (number of electrons on outer most energy level) which shows that the...
hi, the 65 elements found on earth are arranged in order of increasing atomic number (Z) as you go from left to right across the table. We call the horizontal rows periods and the vertical rows...