The newest 5 of 5 written questions. Open one to see it on the real paper.
Americium‑241 has the nuclide notation 24915 Am. State the number of neutrons in the nucleus of an atom of americium‑241.
See it on the paper →A radioactive isotope of iodine, iodine‑123, is used by a doctor to examine the thyroid gland of a patient. The nuclide notation for the isotope is 123 53 I. State what the numbers 123 and 53 represent. 123
See it on the paper →Strontium-87 is produced by the decay of rubidium-87. Use correct nuclide notation to complete the decay equation for rubidium-87. 87 Rb 37 87 Sr +
See it on the paper →Lead-210 ( 210 82 Pb) will decay to form an isotope of bismuth. Use the correct nuclide notation to complete the decay equation for lead-210. 210 Pb Bi + 83
See it on the paper →Use the correct nuclide notation to complete the symbol equation for this decay process. 14 6 __ __ C N + __ __ __
See it on the paper →The main misconception seen was incorrect notation given to the beta particle. However, most candidates accessed both marks available.
— Examiner report, February/March 2022, 0654/42 Q12(c)(ii) (Cambridge)
A large number of candidates were able to correctly add the atomic number and proton number for nitrogen to the incomplete equation, however fewer were able to use the correct nuclide notation to include a beta particle. Some candidates used the symbol for an electron rather than a beta particle, which was accepted.
— Examiner report, October/November 2021, 0654/43 Q3(b) (Cambridge)
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