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.
O The chemical formula for lithium sulfide is Li*S_{2}
O Both lithium and sulfur form positive ions.
OA molecular model of lithium sulfide would have two spheres.
The atoms in lithium sulfide are held together by bonds.
The correct statement about lithium sulfide is: "The atoms in lithium sulfide are held together by bonds."
The correct statement about lithium sulfide is: "The atoms in lithium sulfide are held together by bonds."
To understand why this statement is correct, let's break it down and explain each option.
Option 1: "The atoms in lithium sulfide are held together by bonds."
This statement is correct because lithium sulfide is composed of two different elements, lithium and sulfur, which are chemically bonded to form the compound. Bonds are formed when atoms share or transfer electrons, resulting in a stable arrangement. In the case of lithium sulfide, lithium donates one electron to sulfur to form ionic bonds, resulting in the formation of Li^+ (lithium ion) and S^2- (sulfide ion). These ions then attract each other due to their opposite charges and form a bond between them.
Option 2: "The chemical formula for lithium sulfide is Li*S_{2}."
This statement is incorrect because the actual chemical formula for lithium sulfide is Li2S. The subscript "2" is used to indicate that there are two atoms of lithium in the compound, whereas the "S" represents one atom of sulfur.
Option 3: "Both lithium and sulfur form positive ions."
This statement is also incorrect. In lithium sulfide, lithium forms a positive ion (Li^+) by donating its one valence electron, while sulfur forms a negative ion (S^2-) by gaining two electrons to achieve a stable electron configuration. Therefore, lithium forms a cation (positively charged ion), and sulfur forms an anion (negatively charged ion).
Option 4: "A molecular model of lithium sulfide would have two spheres."
This statement is incorrect because lithium sulfide is an ionic compound, not a molecular compound. In an ionic compound, like lithium sulfide, the ions are arranged in a crystal lattice structure and are not represented as discrete molecules. Therefore, a molecular model of lithium sulfide would not show individual spheres but rather depict the arrangement of positively charged lithium ions and negatively charged sulfur ions in the crystal lattice.
Based on the explanations provided, the correct statement is: "The atoms in lithium sulfide are held together by bonds."