The element Ga has how many valence electrons?

1 Answer
Jun 11, 2017



For the representative elements (the main group elements), which are groups 1, 2, and 13-18, the number of valence electrons is directly related to what group it's in:

  • Groups 1 and 2 elements have one and two valence electrons, respectively.

  • Groups 13-18 elements have three, four, five, six, seven, and eight valence electrons, in progressive order.

Gallium (#"Ga"#) is located in group 13, so it therefore has #color(blue)(3# valence shell electrons.