Answer: [kr]4s2 3d10 4p1
Explanation: Gallium lies between argon(Z=18) and krypton (Z=36).So we can abbreviate the configuration of the first 18 electrons with [Ar].Gallium is in the fourth period since it follows argon ,so the first subshell to fill will be 4s2.The subshell is then filled and we are left with one electron to go in the 4p subshell.The complete configuration is thus [Ar]4s2 3d10 4p1.
Q: Fluorine atoms tend to ______. When they form chemical compounds with metals:
(a) : lose electrons
(b) : gain electrons
(c) : neither lose nor gain electrons… they usually share electrons equally with metals.
(d) : Fluorine atoms do not form compounds with other atoms…fluorine is an inert gas