O. How many protons, neutrons and electrons are in Neodymium - 144 (Nd-144) ?

a. 60. 84, 60

b. 60, 60, 60

C. 60, 144, 60

d. 84. 60. 60

Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of neodymium-144 (atomic number: 60), an isotope of this element. The nucleus consists of 60 protons (red) and 84 neutrons (orange). 60 electrons (white) successively occupy available electron shells (rings).