Which is denser: iron or aluminum?

• A. Aluminum
• B. Iron
• C. Neither is denser than the other
• D. Both have the same density

Answer: (B)

Verified step by step guidance

1. Recall that density is defined as mass per unit volume, given by the formula \(\text{density} = \frac{\text{mass}}{\text{volume}}\).
2. Understand that the density of a material depends on how closely packed its atoms are and the atomic mass of the elements involved.
3. Look up or recall the standard densities of iron and aluminum: iron typically has a density around 7.87 g/cm³, while aluminum has a density around 2.70 g/cm³.
4. Compare these values directly to determine which material is denser by seeing which has the higher density value.
5. Conclude that the material with the higher density value is denser; in this case, iron is denser than aluminum.