(B) An $\alpha$-particle consists of $2$ protons and $2$ neutrons,which is identical to the nucleus of a helium atom $(_{2}^{4}He^{2+})$.Since it lack

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(B) An $\alpha$-particle consists of $2$ protons and $2$ neutrons,which is identical to the nucleus of a helium atom $(_{2}^{4}He^{2+})$.Since it lacks its two orbital electrons,it is referred to as a doubly ionised helium atom.

Class 12 Physics Nuclei Properties of Alpha, Beta and Gamma Rays and Decay Process

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Alpha rays emitted from a radioactive substance are

TS EAMCET 2020 All TS EAMCET

A
negatively charged particles
B
doubly ionised helium atoms
C
ionised hydrogen nuclei
D
uncharged particles

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Class 12

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Chapter

Nuclei

Subtopic

Properties of Alpha, Beta and Gamma Rays and Decay Process

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The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter nucleus is an

MediumAIPMT 2009

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During a $\beta^{-}$-decay,

MediumKCET 2020

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When $_{90}^{228}Th$ transforms to $_{83}^{212}Bi$,the number of emitted $\alpha$- and $\beta$- particles is,respectively:

Medium

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$A$ positron is emitted from ${}^{23}Na_{11}$. The ratio of the atomic mass and atomic number of the resulting nuclide is

DifficultIIT 2007

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Pauli suggested the emission of neutrino during $\beta^{+}$ decay to explain:

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Alpha rays emitted from a radioactive substance are

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The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter nucleus is an

During a $\beta^{-}$-decay,

When $_{90}^{228}Th$ transforms to $_{83}^{212}Bi$,the number of emitted $\alpha$- and $\beta$- particles is,respectively:

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