Question

Define isodiapheres and give 2 examples?

Answer 1

Isodiaphers are atoms, having different atomic number and mass number but have same difference between number of neutron and number of proton

for example
90Th234 and 92U238
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in thorium proton number is 90 and neutron number is 144
144-90 = 54
in uranium proton number is 92 and neutron number is 146
146 - 92 = 54