Isobars are atomic species having the same mass number but different atomic number e.g. etc. they differ in chemical properties, however physical properties related to mass are same
Isotones are atoms having same number of neutrons but different mass number e.g. . (All have 16 neutrons).
Isomers (nuclear) are atoms having the same mass number and same atomic number but with different radioactive properties e.g. .
The above four terms may be summed up as:
|Term||No. of Protons||No. of Neutrons||Mass number||Example|
Isodiaphere: Have same (n – z) or (A – 2z) value
n = 10
z = 9
n – Z = 10 -9 = (1)
A -2Z = 19 -18 = (1)
N = 20
Z = 19
n – Z = 20 -19 = (1)
A – 2Z = 39 -38 = (1)
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