Same chapter1 markDifficulty: Medium
When a nucleus emits a beta particle, its atomic number:
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3 marksDifficulty: Medium
A nucleus of atomic number 92 and mass number 238 emits an alpha particle. Write the atomic number and mass number of the nucleus formed.
Original Khojo Papers practice question — not from a past board paper.
Answer
Atomic number 90 and mass number 234
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
An alpha particle carries away 2 protons and 2 neutrons, so the atomic number falls by 2 and the mass number by 4.
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