Question

The alpha radiation is not used in radiotherapy because:
[A] It is an ionizing radiation
[B] It is unable to penetrate human skin
[C] It is toxic to human tissues
[D] It is not cost effective

Answer 1

Answer:

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The alpha radiation is not used in radiotherapy because:

[A] It is an ionizing radiation

[B] It is unable to penetrate human skin✔︎

[C] It is toxic to human tissues

[D] It is not cost effective

Answer 2

↔Question:

The alpha radiation is not used in radiotherapy because:

[A] It is an ionizing radiation

[B] It is unable to penetrate human skin

[C] It is toxic to human tissues

[D] It is not cost effective

↔

Answer:  It is unable to penetrate human skin.

               (B)

• Penetration is when a molecule is applied to the skin and penetrates through to the bottom layer of the epidermis, the stratum basale.