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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

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.

The chemical formula for lithium sulfide is LiS2.

1 answer

The correct statement about lithium sulfide is:

The atoms in lithium sulfide are held together by bonds.

To explain further:

  • Lithium sulfide (Li2S) is formed from lithium (Li) and sulfur (S) atoms. In this compound, lithium forms a positive ion (Li⁺) while sulfur forms a negative ion (S²⁻), which means only lithium forms positive ions, not sulfur. Therefore, the statement "Both lithium and sulfur form positive ions" is incorrect.
  • The chemical formula for lithium sulfide is indeed Li2S (not LiS2), making the statement about the chemical formula incorrect as well.
  • A molecular model of lithium sulfide would involve the representation of ions held together by ionic bonds, rather than being depicted as just two spheres.

Thus, the statement about the bonds is the most accurate one.