Radioactive element "p" with mass number 238 and atomic number 92 undergoes alpha decay once and after that its undergoes beta decay twice. what is the mass number and atomic number of this new element
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In an alpha decay, the mass number decreases by 4 and the atomic number decreases by 2. Therefore, after an alpha particle is emitted, the mass no. will be 234, and the atomic number will be 90.
In beta decay, the proton number increases by 1 and the atomic mass remains unchanged. Since it undergoes beta decay twice, you just need to add 2 to the atomic number, to get 92.
Your final answer will be:
Proton/atomic number: 234
Atomic mass: 92
In beta decay, the proton number increases by 1 and the atomic mass remains unchanged. Since it undergoes beta decay twice, you just need to add 2 to the atomic number, to get 92.
Your final answer will be:
Proton/atomic number: 234
Atomic mass: 92
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