Which element from following belongs to oxygen family?
Which element from following belongs to oxygen family?
$\mathrm{Ba}$
$\mathrm{Se}$
$\mathrm{Rb}$
$\mathrm{Ca}$
Solution
oxygen group element, also called chalcogen, namely, oxygen $(\mathrm{O})$, sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv).