The Data Booklet may be needed for this question. $2.920\ \text{g}$ of a Group II metal, $X$, is reacted with an excess of chlorine, producing $5.287\ \text{g}$ of a compound with formula $X\text{Cl}_2$. What is the identity of metal $X$?
- Abarium
- Bcalcium
- Cmagnesium
- Dstrontium