If you have 222 g of radioisotope with a half-life of 5

Question

Question 1: Nuclear equation

a) Write a nuclear equation for the beta decay of thallium-210.

b) Plutonium-239, a toxic isotope that cause lung cancer, is an alpha emitter. Write nuclear equation.

c) Write the nuclear equation for the alpha decay of Po-210.

d) Write the nuclear equation for U-235 fissions to form Ba-138, Kr-95 and neutrons.

Question 2: Nuclear energy

a) If 1.8 × 10¹⁴ J is released in a nuclear reaction, how much matter was lost?

E = mc² or ΔE = Δmc² c: 3.0 x 108m/s 1J = 1kg·m²/s²

b) If this much energy was released from the combustion of coal, the heat of combustion of coal is 29 kJ/g. How many grams of coal would be consumed?

Question 3: The Half-life of radioactive decay

a) If you have 222 g of radioisotope with a half-life of 5 days, how much isotope would remain after 15 days?

b) What percentage of a radioactive isotope would remain after four half-lives?