(a)[2]
The decay of nucleus $^{35}_{18}\text{Ar}$ by $\beta^{+}$ emission can be written as $^{35}_{18}\text{Ar} \rightarrow X + \beta^{+} + Y$. A nucleus X together with the particles $\beta^{+}$ and Y is formed in the decay. State: (i) the proton number and the nucleon number of nucleus X (ii) the name of the particle shown by the symbol Y.
(b)[2]
A hadron is made from two down quarks and one strange quark. Determine, in terms of the elementary charge $e$, the charge carried by this hadron.