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) Responses The chemical formula for lithium sulfide is LiS2. The chemical formula for lithium sulfide is LiS 2 . A molecular model of lithium sulfide would have two spheres. A molecular model of lithium sulfide would have two spheres. Both lithium and sulfur form positive ions. Both lithium and sulfur form positive ions. The atoms in lithium sulfide are held together by bonds. The atoms in lithium sulfide are held together by bonds.

Answer 1

The correct statement about lithium sulfide is: **The atoms in lithium sulfide are held together by bonds.**

Here's why the other statements are incorrect:

1. **The chemical formula for lithium sulfide is LiS2.** - This is incorrect. The correct chemical formula for lithium sulfide is **Li2S**, indicating two lithium atoms for every one sulfur atom.

2. **A molecular model of lithium sulfide would have two spheres.** - This is misleading. While a model might show two lithium atoms and one sulfur atom, it would actually represent three spheres in total (two for lithium and one for sulfur).

3. **Both lithium and sulfur form positive ions.** - This is also incorrect. Lithium (Li) forms a positive ion (Li⁺), but sulfur (S) typically forms a negative ion (S²⁻) in ionic compounds like lithium sulfide.

Thus, the most accurate statement is about the presence of bonds holding the atoms together in lithium sulfide.