Home › Previous year questions › GATE 2025 BM › Question 25GATE 2025 BM – Question 25 Medical Imaging Systems · Nuclear Imaging · 1 mark · Multiple choice
$ {}^{9}_{6}C$ and $ {}^{10}_{6}C$ are ____, whereas $ {}^{9}_{6}C$ and $ {}^{8}_{5}B$ are ____.
Isotopes; isomers Isomers; isotopes Isotopes; isotones Isotones; isotopes Practise this question in The GATE Grind →
Show answer and explanation Correct answer: (C) Isotopes; isotones
Explanation The carbon pair shares atomic number six but has different mass numbers, so they are isotopes. Carbon-nine has 9−6=3 neutrons; boron-eight has 8−5=3. Equal neutron number with different atomic number defines isotones. Hence C.
More Nuclear Imaging questions GATE 2024 BM Q16 – Which statement is true for PET imaging? GATE 2024 BM Q54 – For the source’s ideal inverse-square radiation model, a person one metre from a… GATE 2022 BM Q49 – Radionuclide P has half-life four times that of Q. At t=0 both have N₀ atoms. At what time… GATE 2021 BM Q34 – A radionuclide has decay constant 3.22×10⁻⁵ s⁻¹ and activity 6 mCi at 10:30 AM. Find… GATE 2021 BM Q64 – A radioisotope has activity 2 mCi, decay constant 3.22×10⁻⁵ s⁻¹ and atomic molar mass 98… GATE 2020 BM Q29 – NaI crystals detect 120 keV gamma rays. If their half-value layer is 0.2 cm, what… All Nuclear Imaging questions →