The numbers of s,p,d and f-electrons in caesium atom are respectively 
 

Atomic number of Caesium- 55

Electronic configuration of Caesium- $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}3{\mathrm{d}}^{10}4{\mathrm{s}}^{2}4{\mathrm{p}}^{6}4{\mathrm{d}}^{10}5{\mathrm{s}}^{2}5{\mathrm{p}}^{6}6{\mathrm{s}}^1$
 

Electrons in s orbitals- 11

Electrons in p orbitals- 24

Electrons in d orbitals- 20

Electrons in f orbitals- 0