Q127 / 180 · NEET 2019 (All India) · Physics

$α$ -particle consists of

Correct answer
A
$2$ protons and $2$ neutrons only
B
$2$ electrons, $2$ protons and $2$ neutrons
C
$2$ electrons and $4$ protons only
D
$2$ protons only

Solution

Alpha particles are composite particles consisting of two protons and two neutrons tightly bound together. They are emitted from the nucleus of some radionuclides during radioactive decay, called alpha-decay.

$α$ particle $\to_{2} {He}^{4}$

No. of protons $\to 2$

No. of neutrons $\to 4 - 2 = 2$

Hence, the correct answer is option: 'A'.

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α-particle consists of

Solution

Relevant Questions

$α$ -particle consists of