The answer is 'groups', there are 18 main groups and two special ones (with 14 lantanides and 14 actinides respectively).
Groups contain elements with the same 'outer' electron configuration (valence electrons).
17+1
Groups, or Families.
groups are the vertical columns on the periodic table
The vertical sections of the periodic table are called groups or columns.
the vertical columns in the periodic table are known as groups.
Groups or families are the vertical columns on the periodic table. Periods are the horizontal rows on the Periodic Table.
the vertical columns in a periodic table are called groups.
A vertical column is called a 'group.' A horizontal row is called a 'period,' thus the periodic table.
The columns in the periodic table are called groups or families. These columns contain elements with similar chemical properties due to their shared number of valence electrons.
There are NO vertical ROWS, because rows run horizontally, and COLUMNS run vertically. There are 18 vertical columns in the periodic table.
A group is vertical column. There are 18 groups in periodic table.
The vertical columns.