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Question

The nuclides with same difference of number of neutrons and number of protons are called:

A
Isomers
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B
Isotops
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C
Isodiaphers
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D
Isoelectronic species
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Solution

The correct option is C Isodiaphers
The nuclides with same difference of number of neutrons and number of protons are called Isodiaphers.
In other words, atoms having same isotopic number are called isodiaphers.
Isotopic number (isotopic excess) =NZ=A2Z
Here N is the number of neutrons, Z is the number of protons or atomic number and A is the mass number.
Following are the pairs of isodiaphers
(1)23592U and 23190Th
(2) 3919K and 199F
(3) 6529Cu and 5524Cr

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