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15 March, 15:19

Uranium-238 decays by alpha emission. What is the mass number of the resulting element?

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  1. 15 March, 16:23
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    The answer to your question is 234.

    Explanation:

    Alpha emission is a type of radioactive composed on two positive charges and two neutrons, its total mass is 4, the element with these characteristics is Helium.

    Then,

    Uranium-238 ⇒ Thorium-234 + Helium-4

    Because 234 + 4 = 238
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