An exact mass of $1.00\,\text{g}$ of a metallic element reacts fully with $300\,\text{cm}^3$ of oxygen at $298\,\text{K}$ and $1\,\text{atm}$ pressure, producing an oxide containing $\text{O}^{2-}$ ions. At this temperature and pressure, one mole of gas occupies $24.0\,\text{dm}^3$. Which metal could this be?
- Acalcium
- Bmagnesium
- Cpotassium
- Dsodium