Which element has a complete valence electron shell?
selenium (se)
oxygen (o)
fluorine (f)
argon (ar)

The element that has a complete valence electron shell is

Argon(Ar)

Argon is in group 18 and period three in the periodic table. Therefore Argon electronic configuration is 2.8.8 or 1s^2 2s^2 2P^6 3S^2 3P^6 or [Ne] 3s^2 3p^6. The valence electrons of Argon is 3s^2 3p^6 which are completely filled since an 3S subshell can hold a maximum of 3 electrons while a 3P subshell can accommodate a a maximum of 6 electrons hence, Argon has a complete filled valence shell.

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.