For each of the following chemical symbols, give the name of the corresponding element.
$\begin{array}{ll}{\text { a. Os }} & {\text { e. } U} \\ {\text { b. } Z r} & {\text { f. Mn }} \\ {\text { c. Rb }} & {\text { g. Ni }} \\ {\text { d. Rn }} & {\text { h. Br }}\end{array}$