Which statement about compounds and molecules is correct?
1. All molecules are compounds.
2. All compounds are molecules.
3. Compounds are composed of molecules bonded together.
4. Molecules are composed of compounds bonded together.
I don't like any of the choices but #2 comes the closest. I would prefer that it say, "All compounds are COMPOSED OF molecules."
Perhaps I'm just being picky.
Why did the compound go to therapy?
Because it couldn't bond with anyone!
But in all seriousness, option 3 is correct. Compounds are composed of molecules bonded together.
The correct statement is number 3: Compounds are composed of molecules bonded together.
The correct statement about compounds and molecules is: 3. Compounds are composed of molecules bonded together.
To understand why this statement is correct, let's first define compounds and molecules:
- Compounds: Compounds are substances that are composed of two or more different elements chemically bonded together. They have a fixed ratio of the atoms of each element.
- Molecules: Molecules, on the other hand, are formed when two or more atoms are chemically bonded together. A molecule can be made up of atoms of the same element (like O2, which is made up of two oxygen atoms) or different elements (like H2O, which is made up of two hydrogen atoms and one oxygen atom).
Now, let's analyze the given statements:
1. All molecules are compounds. This statement is incorrect. Although compounds can have molecules as their components, not all molecules are compounds. For example, O2 is a molecule but not a compound.
2. All compounds are molecules. This statement is incorrect. While some compounds can be formed by molecules, not all compounds are made up of molecules. Some compounds exist as individual ions (like NaCl, which is composed of sodium and chloride ions).
3. Compounds are composed of molecules bonded together. This statement is correct. Compounds are formed when molecules chemically bond together. For example, water (H2O) is a compound composed of two hydrogen molecules and one oxygen molecule.
4. Molecules are composed of compounds bonded together. This statement is incorrect. Molecules themselves are not composed of compounds bonded together. Molecules are formed from the chemical bonding of atoms, not compounds.
In conclusion, the correct statement is that compounds are composed of molecules bonded together.