Which is more dense: lead (Pb) or aluminum (Al)?

• A. Lead (Pb)
• B. Both have the same density
• C. Aluminum (Al)
• D. Neither is dense

Answer: (A)

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 density depends on how tightly atoms are packed in a material and the atomic mass of the element.
3. Look up or recall the approximate densities of lead (Pb) and aluminum (Al): lead has a much higher atomic mass and atoms packed more closely than aluminum.
4. Compare the numerical values of their densities: lead's density is significantly higher than aluminum's density.
5. Conclude that lead (Pb) is more dense than aluminum (Al) based on the comparison of their densities.