Writing Nuclear Equations for Beta Decay, Positron Emission, and Electron Capture

Write the nuclear equation for each decay process.

(a) beta decay in Bk-249 (b) positron emission in K-40 (c) electron capture in I-111

Question

Writing Nuclear Equations for Beta Decay, Positron Emission, and Electron Capture

Write the nuclear equation for each decay process.

(a) beta decay in Bk-249 (b) positron emission in K-40 (c) electron capture in I-111

Accepted Answer

(a) In beta decay, the atomic number increases by 1 and the mass number remains unchanged.The daughter nuclide is element number 98, californium.

[latex]^{249}_{97}Bk→ ^{249}_{98}? + ^{0}_{-1}e [/latex]

[latex]^{249}_{97}Bk→ ^{249}_{98}Cf + ^{0}_{-1}e [/latex]

(b) In positron emission, the atomic number decreases by 1 and the mass number remains unchanged.
The daughter nuclide is element number 18, argon.

[latex]^{40}_{19}K→ ^{40}_{18}? + ^{0}_{+1}e [/latex]

[latex]^{40}_{19}K→ ^{40}_{18}Ar + ^{0}_{+1}e [/latex]

(c) In electron capture, the atomic number decreases by 1, and the mass number remains unchanged.
The daughter nuclide is element number 52, tellurium.

[latex]^{111}_{53}l+ ^{0}_{-1}e → ^{111}_{52}?[/latex]

[latex]^{111}_{53}l+ ^{0}_{-1}e → ^{111}_{52}Te[/latex]

Question 19.2: Writing Nuclear Equations for Beta Decay, Positron Emission,...

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