In a molecule of lithium sulfide, there are two atoms of lithium and one atom of sulfur. Which statement about lithium sulfide is correct?
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.
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 three spheres.
A molecular model of lithium sulfide would have two spheres.
The correct statement about lithium sulfide is: "The atoms in lithium sulfide are held together by bonds."
To arrive at this answer, we need to understand the properties of lithium and sulfur atoms and their ability to form ions.
Lithium is an alkali metal and typically forms a positive ion (Li+) by losing an electron. Sulfur is a nonmetal and usually gains two electrons to form a negative ion (S2-).
In lithium sulfide (Li2S), there are two atoms of lithium and one atom of sulfur. Both lithium atoms lose one electron each to form two Li+ ions, and the sulfur atom gains two electrons to form one S2- ion. These oppositely charged ions attract each other and are held together by ionic bonds.
Thus, the correct statement is that the atoms in lithium sulfide are held together by bonds.