C-4 is unstable, because it would be very difficult for 6 protons to hold 10 electrons. True or false.
True
In case C-4, the number of electrons in the outer most orbit is 8. Thus the total number of electrons including 2 electrons in the inner orbit is 10. But the number of protons still remains the same .i.e. 6. Thus it becomes difficult for 6 electrons to hold back 10 electrons.