Question

1. sodium chloride can be made by reacting sodium metal with chlorine gas. which statements correctly describe sodium chloride? select all that apply. sodium chloride is a substance. sodium chloride is a compound. sodium chloride is composed of two elements. sodium chloride is an element.

Explanation:

1. Sodium chloride is a substance: A substance is matter with a definite composition. Sodium chloride has a fixed chemical formula ($NaCl$), so it is a substance.
2. Sodium chloride is a compound: A compound is a substance made of two or more different elements chemically bonded. $NaCl$ is made of sodium ($Na$) and chlorine ($Cl$), so it is a compound.
3. Sodium chloride is composed of two elements: The formula $NaCl$ shows it is made of sodium (an element) and chlorine (an element), so it has two elements.
4. Sodium chloride is an element: An element is a pure substance with only one type of atom. $NaCl$ has two types of atoms, so this is incorrect.

Answer:

• Sodium chloride is a substance.
• Sodium chloride is a compound.
• Sodium chloride is composed of two elements.