# What is the name of Sn(CrO_4)_2?

$\text{Sn}$ is the element Tin.
${\text{CrO}}_{4}$ is the chromate ion, which has a charge of $- 2$
The total charge of the chromate ions is $- 4$, so Tin must have a charge of $+ 4$ to compensate. This means that Tin forms a $+ 4$ ion and is denoted by a Roman Numeral IV in parentheses. Therefore, the full name is Tin(IV) Chromate.