Question

After watching the lectures I am still having a hard time understanding these equations.

1. The half-life of tritium is 12.3 years. How long does it take for a 48.0g sample to be reduced to 2.0g? Answer using equation(s). (I know itll be around 50 years but unsure about the equation)

2. Write balanced equations for: bismuth-214 undergoes beta decay, plutonium-242 emits alpha radiation, selenium-81 undergoes beta decay, uranium-235 undergoes alpha decay, ¹¹C emits a positron, O-15 undergoes electron capture

3. Write balanced equations for: ²⁴¹Am emits alpha radiation, chromium-51 undergoes electron capture, ⁹⁹Tc emits a gamma particle, fluorine-18 emits a positron, ¹²⁴Sb emits a beta particle.

4. What kind of nuclear decay/capture is each of the following (write full equations and name process):

²¹⁶Rn -> ⁴₂He + ____

___ --> ⁴₂He + ²³⁹Bk

5. ¹³N decays with a half-life of approximately 10 min to produce ¹³C, a stable isotope of carbon. For a 1.0g sample of ¹³N, after one half-life, what mass of ¹³N remains? What has happened to the remaining mass?

Could you explain the steps please?

Answer 1