define relative atomic mass, \(A_r\), relative isotopic mass, relative molecular mass, \(M_r\) and relative formula mass in terms of the unified atomic mass unit

calculate the relative atomic mass of an element given the relative abundances of its isotopes, or its mass spectrum

determine the electronic configuration of atoms and ions given the atomic or proton number and charge, using either of the following conventions: e.g. for Fe: \( 1s^2 2s^2 2p^6 3s^2 3p^6 3d^6 4s^2 \) (full electronic configuration) or \( [Ar] 3d^6 4s^2 \) (shortband electronic configuration)