Which characteristic of an outermost shell is required for an atom to not need any electrons? A. 1 electron
B. more than 2 electrons
C. more than 21 electrons
D. a full

If the last shell is full then it won't need any electron

i it is d i hope it

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.