An atom of Sn124Sn124 has an experimentally determined nuclear mass of 123.9053123.9053 amu. Calculate the mass defect, Δ?Δm, in atomic mass units (amu).

When radon-222 decays by a-emission, what is the daughter nucleus? Give its name, mass number A and atomic number Z. [3] When cobalt 60 decays by v-emission what is the daughter nucleus? Give its

21.6) Consider the following equation: The mass number of element X is: 247A + 18B → 89C + {x}X + 2 1n

The first four steps in the radioactive decay sequence of Po-218 are a, B, a, B. To write the reaction equations for this decay series, first determine the product of t step. a decay of Po-218 gives: symbol = Pb mass number = 214 atomic number = 82 Po undergoes four decay reactions: a, B, a, B. Step 1. 218 Po undergoes a decay to give Pb In the second step, Pb-214 undergoes ß decay. What is the product of this step? symbol = mass number = atomic number =