Cobalt, rhodium and iridium are metals in the same group of the Periodic Table. Table 1.2 shows the relative abundances of isotopes in a sample of an alloy containing rhodium and iridium only. Table 1.2 (i) Define relative isotopic mass. ....................................................................................................................................... . ....................................................................................................................................... . ................................................................................................................................. (ii) Use Table 1.2 to calculate the relative atomic mass, $$\(A_{\mathrm{r}}\)$$, of iridium in the alloy. Give your answer to two decimal places. relative atomic mass of iridium $$\(=\)$$ ..........................

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