Question

Give the chemical formula for the compound and compute the ratio by mass of combining elements in magnesium sulfide.

Answer 1

Chemical Formula:

1. The number of atoms in each element of a compound is determined by the chemical formula. It comprises symbols for the constituent atoms as well as subscripts for each element's number.
2. Magnesium sulfide is created when magnesium and sulfide atoms create an ionic connection.
3. Electronic configuration of magnesium$1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^2$, and electronic configuration of sulfur $=1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^4$
4. The outermost valence shell in magnesium contains two electrons whereas in sulfur valence shell contains six electrons.
5. So, Magnesium and sulfide atoms combine and form $\mathrm{MgS}$

Ratio by mass:

1. It is described as the ratio of masses of atoms contained in a compound.
2. Molecular mass of magnesium $=24$ and molar mass of sulfur$=32$.
3. Ratio of Mass$=\mathrm{Mg}:\mathrm{S}\Rightarrow 24:32\Rightarrow 3:4$