An element sits in period 5 and group 14. Write its outer configuration and find its atomic number.

The period is the principal quantum number of the outermost shell. s-block: groups 1 and 2, $ns^{1 \text{ or } 2}$. p-block: groups 13 to 18, group $= 10$ + outer s and p electrons. d-block: groups 3 to 12, group = d electrons + outer s electrons. f-block: lanthanoids (4f, period 6) and actinoids (5f, period 7).