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Element Group (Elemental Family)
  In elemental science, a Element group (Elemental family) is a vertical column of elements in the periodic table of the chemical elements, numbered 1 through 18, with the f-block columns between groups 3 and 4 left unnumbered.
  The element groups are usually numbered on top of each column as Arabic numerals (digits). The elements in any given group has similar physical or chemical characteristics of the outermost electron shells of their atoms.
  The element groups include:

group 1 elements (hydrogen group aka the hydrogen and alkali metals group)
group 2 elements (beryllium group aka the hydrogen and alkaline earth metal group)
group 3 elements (scandium group)
group 4 elements (titanium group)
group 5 elements (vanadium group)
group 6 elements (chromium group)
group 7 elements (manganese group)
group 8 elements (iron group)
group 9 elements (cobalt group)
group 10 elements (nickel group)
group 11 elements (copper group)
group 12 elements (zinc group)
group 13 elements (boron group)
group 14 elements (carbon group)
group 15 elements (pnictogen group)
group 16 elements (oxygen group aka chalcogens)
group 17 elements (fluorine group aka halogens)
group 18 elements (helium group aka the noble gas group)
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