Question

sodium (na) is a gray, metallic solid that reacts strongly with water. chlorine (cl₂) is a highly toxic, yellow - green gas. when na and cl atoms combine, they form a compound that is used to season our food: table salt (nacl). why do sodium metal, chlorine gas, and table salt have such different properties? in part, these differences exist because atoms in each substance are held together by a different type of chemical bond. a chemical bond is an attractive force between atoms. select the true statements. a compound has the same properties as its component atoms. when atoms of two different elements bond, they form a new compound with unique properties. sodium and chlorine are both solids at room temperature. in table salt, sodium and chlorine are held together by chemical bonds.

Explanation:

1. A compound's properties are different from its component atoms. For example, sodium metal and chlorine gas combine to form table - salt with distinct properties. So the statement "A compound has the same properties as its component atoms" is false.
2. When atoms of different elements bond, they form a new compound with unique properties. Sodium and chlorine form table - salt which has different properties from sodium and chlorine themselves.
3. Sodium is a solid at room temperature, but chlorine is a gas at room temperature, so the statement "Sodium and chlorine are both solids at room temperature" is false.
4. In table - salt (NaCl), sodium and chlorine are held together by chemical bonds (ionic bonds in this case).

Answer:

B. When atoms of two different elements bond, they form a new compound with unique properties.
D. In table salt, sodium and chlorine are held together by chemical bonds.