What is alpha-particle?

The nucleus of hydrogen atom

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The nucleus of deuterium

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A fast moving proton

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The nucleus of helium atom

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Solution

The correct option is C The nucleus of helium atom
$\begin{matrix} Alpha particle is the nucleus of a {helium atom}_{2}^{4} H e . \end{matrix}$

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Similar questions

Q. An atomic nucleus A is composed of

84

protons and

128

neutrons. The nucleus A emits

α

-particle and is transformed into a nucleus B. What is the composition of B ?

An atomic nucleus A is composed of 84 protons and 128 neutrons.

The atomic nucleus A emits an alpha particle and is transformed into nucleus B. The atomic nucleus B emits a $β$ - particle and is transformed into a nucleus C. What is the composition of atomic nucleus C?

Q. The masses of neutron and proton are

1.0087 a . m . u .

and

1.0073 a . m . u .

respectively. If the neutrons and protons combine to form a helium nucleus (alpha particles) of mass

4.0015 a . m . u

, then the binding energy fo the helium nucleus will be: (

1 a . m . u . = 931 M e V

)

Q. Helium nucleus is composed of two protons and two neutrons. If the atomic mass is

4.00388

, how much energy is released when the nucleus is constituted?
(Mass of proton

= 1.00757

, Mass of neutron

= 1.00893

)

Q. The gap between electron and nucleus(proton) in hydrogen atom is:

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What is alpha-particle?

The correct option is C The nucleus of helium atom Alpha particle is the nucleus of a helium atom 42He .

The correct option is C The nucleus of helium atom
$\begin{matrix} Alpha particle is the nucleus of a {helium atom}_{2}^{4} H e . \end{matrix}$