How long does it take a sample with a flow rate of 0.5 mL/min to move through a mixing coil of 50 cm with an internal diameter of 0.8 mm to the detector?
a) 60 seconds
b) 30 seconds
C) 15 seconds.
d) 45 seconds

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.

Particle exchange energy though elastic collision , hope this .