Californium oxide is a solid compound with two
isotopes
Isotopes are two or more types of atoms that have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), and that differ in nucleon numbers (mass numbers) ...
. "Californium oxide" may refer to:
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Californium(III) oxide, a yellow-green chemical compound
*
Californium(IV) oxide, a dark brown chemical compound
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