Ib Physics Hl Review Packet: Nuclear Physics Worksheet Page 6
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14(2)
(ii)
isotope
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(1)
(b)
The isotope sodium-24 undergoes radioactive decay to the stable isotope magnesium-24.
(i)
Complete the nuclear reaction equation for this decay.
24
24
Na
Mg
11
12
(2)
(ii)
One of the particles emitted in the decay has zero rest-mass. Use the data below to estimate the rest mass, in
24
Na
atomic mass units, of the other particle emitted in the decay of
11
24
NA
rest mass of
= 23.99096u
11
24
Mg
rest mass of
= 23.98504u
12
energy released in decay = 5.002160 MeV
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(3)
(c)
The isotope sodium-24 is radioactive but the isotope sodium-23 is stable. Suggest which of these isotopes has the greater
nuclear binding energy.
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(2)
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