
Californium has 98 protons, 153 neutrons, and 98 electrons.
#1 Californium Protons
- Protons = atomic number
From the periodic table, find the atomic number of californium.

The atomic number of californium is 98. Hence, californium has a total of 98 protons.
#2 Californium Neutrons
- Neutrons = atomic mass – atomic number

The atomic mass of californium is 251 and the atomic number of californium is 98.
Subtract the atomic number (98) from the atomic mass (251). Hence, californium has a total of 251 – 98 = 153 neutrons.
#3 Californium Electrons
- Electrons = atomic number

The atomic number of californium is 98. Hence, californium has a total of 98 electrons.
Next: Hydrogen Protons Neutrons Electrons
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