Which Element Contains 40 Protons And 51 Neutrons?
Which Element Contains 40 Protons And 51 Neutrons? Zirconium has an atomic number of 40 and an atomic mass of 91. What element has 40 protons and 51 neutrons? Atomic Structure Zirconium as 40 protons and 51 neutrons in its nucleus giving it an Atomic Number of 40 and an atomic mass of 91. Zirconium