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Americium-241 is an alpha emitter used in household smoke detectors and K-40 is a positron emitter used to date rock samples. The daughter nuclides in these two reactions are:

Answer :

Manetho

Answer:

Np-237, Ar-40.

Explanation:

Alpha particle is positively charged particle having a mass of 4 unit. Hence,when alpha is  removed from any isotope it produces a element having  mass 4 units less than original isotope that was before emission. Americium 241 isotopes used in the smoke detector which emit an alpha particle to produce neptunium-237.

Potassium-40 emits positron which is having negative charge to lower one proton and increase one neutron number in the particle and in such way it will produce [tex]^{40}Ar_{18}[/tex] not  [tex]^{40}Ca_{20}[/tex]

Answer:

Neptunium - 237 , Argon - 40 .

Explanation:

Americium - 241   ⇒    Neptunium - 237 + alpha particles

²⁴¹₉₅Am    ⇒     ²³⁷₉₃Np  + ⁴₂α

K-40   ⇒  Argon 40 + positron .

⁴⁰₁₉K    ⇒   ⁴⁰₂₀Ar   +   ₁e

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