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Select the correct answer.

Which notation is used to represent an alpha particle?

A. [tex]${ }_{-1}^0 \beta$[/tex]

B. [tex]$y$[/tex]

C. [tex]${ }_2^4 He$[/tex]

D. [tex]${ }_1^0 n$[/tex]

Sagot :

GinnyAnsweridn
To represent an alpha particle, we must recognize that an alpha particle is a type of ionizing radiation that is composed of 2 protons and 2 neutrons. This makes it a helium nucleus. The correct notation for a helium nucleus is:

[tex]\[ {}_2^4 \text{He} \][/tex]

Here:
- The subscript (2) represents the atomic number, which indicates the number of protons.
- The superscript (4) represents the mass number, which is the total number of protons and neutrons.

Given the options:

A. [tex]${ }_{-1}^0 \beta$[/tex]
- This notation represents a beta particle, specifically a beta-minus particle (an electron).

B. [tex]$y$[/tex]
- This does not represent any standard particle in nuclear physics.

C. [tex]${ }_2^4 He$[/tex]
- This is the correct representation of an alpha particle.

D. [tex]${ }_1^0 n$[/tex]
- This notation represents a neutron.

Therefore, the correct answer is:

C. [tex]${ }_2^4 He$[/tex]
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