Use Slater's rules to calculate the effective nuclear charge, Zeff, for a 3-electron in P, S, and Cl.

a) Zeff(P) = 2.4, Zeff(S) = 3.8, Zeff(Cl) = 4.8
b) Zeff(P) = 3.4, Zeff(S) = 4.8, Zeff(Cl) = 5.8
c) Zeff(P) = 4.2, Zeff(S) = 5.6, Zeff(Cl) = 6.8
d) Zeff(P) = 2.8, Zeff(S) = 4.2, Zeff(Cl) = 5.2