Question

in a molecule of lithium sulfide, there are two atoms of lithium and one atom of sulfur. which statement about lithium sulfide is correct? (1 point)
the atoms in lithium sulfide are held together by bonds.
a molecular model of lithium sulfide would have two spheres.
the chemical formula for lithium sulfide is lis₂.
both lithium and sulfur form positive ions.

Explanation:

• In a compound like lithium sulfide, atoms are held together by chemical bonds (ionic bonds in this case as lithium is a metal and sulfur is a non - metal).
• A molecular model of lithium sulfide (\(Li_2S\)) would have \(2 + 1=3\) spheres (2 for lithium and 1 for sulfur), so the option about two spheres is wrong.
• The chemical formula for lithium sulfide is \(Li_2S\) (since there are two lithium atoms and one sulfur atom), not \(LiS_2\).
• Lithium forms positive ions (\(Li^{+}\)) as it is a metal and loses electrons, while sulfur forms negative ions (\(S^{2 -}\)) as it is a non - metal and gains electrons.

Answer:

The atoms in lithium sulfide are held together by bonds.