Answer : The missing part is, [tex]^{114}_{46}Pd[/tex]
Explanation :
Nuclear fission : It is a process in which a heavy nuclei absorbs a neutron, they split or fission into two small nuclei and 3 neutrons.
Atomic number of Cf = 98
Atomic mass of Cf = 252
Atomic number of Te = 52
Atomic mass of Cf = 136
Atomic number of unknown element = [(252 + 1) - (136 + 3)] = 114
Atomic mass of unknown element = 98 - 52 = 46
So, the unknown element is, palladium (Pd)
The complete nuclear fission of a californium atom will be,
[tex]^{252}_{98}Cf+^1_0n\rightarrow ^{114}_{46}Pd+^{136}_{52}Te+3^1_0n[/tex]
Hence, the missing part is, [tex]^{114}_{46}Pd[/tex]
