HARD
JEE Main
IMPORTANT
Earn 100

The number of stable isotopes is the least when the number of neutrons and protons in the isotopes are, respectively,
(a)odd and odd.
(b)even and odd.
(c)odd and even.
(d)even and even.

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Important Questions on Atomic Structure and Radioactivity
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JEE Main
IMPORTANT
A radioactive nuclide generally disintegrates by emission when its ratio is

MEDIUM
JEE Main
IMPORTANT
atom is an isotone to atom. What is the value of ?

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JEE Main
IMPORTANT
If of a radioactive substance has of the same substance will have a equal to

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JEE Main
IMPORTANT
The designations of a proton and neutron are and respectively. Are the two particles of equal mass?

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JEE Main
IMPORTANT
The nuclides and are

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JEE Main
IMPORTANT
Which of the following nuclides are isobars?

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JEE Main
IMPORTANT
To what stable isotope would decay?

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JEE Main
IMPORTANT
The half-life of a radioactive isotope is . The mass of it that remains undecayed after is (if the initial mass of the isotope was ).
