Question

Polonium-216 decays by alpha particle emission. The chemical symbol of the daughter nuclide is and its mass , its atomic number is number is DI Question 8 10 pts Potassium-40 decays to produce argon-40. Which of the following modes of radioactive decay are possible? That is, which modes would result in the conversion of potassium-40 to argon-40? If more than one mode could achieve this effect, check all that apply. Alpha praticle emission Beta particle emission Electron capture Positron emission Xenon-114 is unstable and undergoes radioactive decay Is it more likely to decay via beta decay or positron emission? The Valley of Stability 140- Valley of stability 120 Zr 1.25 Z 100 80 40 20 20 10 80 100 60 Number of protons i7) NIZ = 1 2 60 40 ㄒㄧㄧˊ 20 0 100 80 60 40 20 Number of protons (2) 2008 Pearson Prentice Hall, Inc. Copyright beta decay positron emission Lead-212 isunstable and undergoes radioactive decay. Is it more likely to decay via beta decay or positron emission? The Valley of Stability 200LN 140 Valley of stability 120 Zr: 1.25 Z 100 6 NIZ = 1 60 40 20 20 40 60 80 100 Number of protons (7) 80 NIZ -1 60 40 20- 100 80 60 40 20 0 Number of protons (7) Copyright 2008 Pearson Prentice Hall, inc. beta decay positron smission

Answer 1

• The nuclear equation that describes the alpha decay of Polonium-216 can be written like this:

²¹⁶₈₄Po → ²¹²₈₂Pb + ⁴₂He

The chemical symbol of the daughter nuclide is Pb​​​. It's atomic number is 82 and its mass number is 212.

•

⁴⁰₁₉K + ⁰_-1e ------>  ⁴⁰₁₈Ar + nuetrino (⁰₀V)

Above equation representing, electron capture mode of radioactive decay.

Hence correct option is Electron capture.