Write pairs of isotones and one pair of mirror nuclei from the following, B 5 10 , C 6 12 , 13 27 Al , C 6 11 , Si 14 28 .

B 5 10 C 6 12 Al 13 27 C 6 11 Si 14 28 Number of p 5 6 13 6 14 Number of n 5 6 14 5 14 The atoms having an equal number of neutrons are called isotones, from the above table, the pair of isotones are: (a) B 5 10 and C 6 11 (b) Al 13 27 and Si 14 28 An atomic nucleus that contains a number of protons and a number of neutrons that are mutually interchanged in comparison with another nucleus are called mirror nuclei. In the given species there is no mirror nuclei.

Half life of Na 24 is 900 minutes. What is its decay constant?

The half life ( t 1 / 2 ) = 900 minute As, decay constant λ = 0 . 693 t 1 / 2 ∴ λ = 0 . 693 900 = 0 . 00077 min - 1 .

Decay constant of Hg 197 is 0 . 017 h - 1 . What is its half life?

Given: The decay constant of Hg 197 λ = 0 . 017 h - 1 Half life ( t t / 2 ) = 0 . 693 λ = 0 . 693 0 . 017 = 40 . 76 hour .

The total binding energy of Ni 58 is 508 MeV . What is its binding energy per nucleon?

Total binding energy of Ni 58 = 508 Mev A mass number of 58 signifies the number of nucleons. ∴ Binding energy per nucleon = 508 58 = 8 . 758 Mev .

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Chemistry>Chapter 13 - Nuclear Chemistry and Radioactivity>Exercises>Q 3

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What is the difference between an $α$ -particle and helium atom?

Important Questions on Nuclear Chemistry and Radioactivity

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Chemistry>Chapter 13 - Nuclear Chemistry and Radioactivity>Exercises>Q 3

Write one point that differentiates nuclear reactions from chemical reactions.

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Chemistry>Chapter 13 - Nuclear Chemistry and Radioactivity>Exercises>Q 3

Write pairs of isotones and one pair of mirror nuclei from the following, ${}_{5}^{10}B, {}_{6}^{12}C, {}_{13}^{27} Al, {}_{6}^{11}C, {}_{14}^{28}{Si}$ .