Question

The element Ga has how many valence electrons?

Answer 1

`3`

Explanation:

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.