A nucleus represented by the symbol ${ }_{Z}^{ A } X$ has
A nucleus represented by the symbol ${ }_{Z}^{ A } X$ has
- [AIPMT 2004]
- A
$Z$ protons and $A$ neutrons
- B
$A$ protons and $Z-A$ neutrons
- C
$Z$ protons and $A - Z$ neutrons
- D
$Z$ neutrons and $A -Z$ protons
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The nuclear radius is given by $R=r_0 A^{1 / 3}$, where $r_0$ is constant and $A$ is the atomic mass number. Then, the nuclear mass density of $U^{238}$ is
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- [KVPY 2019]
$\pi $ mesons can be
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