Which of the following is a correct statement

  • [IIT 1999]
  • A

    Beta rays are same as cathode rays

  • B

    Gamma rays are high energy neutrons

  • C

    Alpha particles are singly ionized helium atoms

  • D

    Protons and neutrons have exactly the same mass

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A nuclear reaction is given by

${}_Z{X^A} \to {}_{Z + 1}{Y^A} + {}_{ - 1}{e^0} + \bar v$ , represents

  • [AIIMS 2012]

A free neutron decays into a proton but a free proton does not decay into neutron. This is because

  • [JEE MAIN 2023]

In the nuclear decay given below 

$_z{X^A}{ \to _{z + 1}}{Y^A}{ \to _{z - 1}}{K^{A - 4}}{ \to _{z - 1}}{K^{A - 4}}$

the particles emitted in the sequence are

  • [AIPMT 1993]

A nucleus with $Z = 92$  emits the following in a sequence $:\,\alpha ,\,\alpha ,\,{\beta ^ - },{\beta ^ - },\alpha ,\,\alpha ,\alpha ,\,\alpha ,{\beta ^ - },{\beta ^ - },\alpha ,{\beta ^ - },{\beta ^ - },\alpha .$The $Z$  of the resulting nucleus is

In the equation ${ }_{13}^{27} Al +{ }_2^4 He \longrightarrow{ }_{15}^{30} P + X ,$ The correct symbol for $X$ is