Which of the following is closest to the mass of a proton?

• A. 1.67 \times 10^{-27} \text{ kg}
• B. 1.00 \times 10^{-24} \text{ kg}
• C. 9.11 \times 10^{-31} \text{ kg}
• D. 4.18 \times 10^{-23} \text{ kg}

Answer: (A)

Verified step by step guidance

1. Understand that the problem asks for the mass of a proton, which is a fundamental particle in chemistry and physics.
2. Recall that the mass of a proton is a well-known constant and is approximately \$1.67 \times 10^{-27}$ kilograms.
3. Compare the given options to this known value to determine which is closest.
4. Note that \$1.00 \times 10^{-24}\( kg is three orders of magnitude larger than the proton mass, \)9.11 \times 10^{-31}\( kg is much smaller (close to electron mass), and \)4.18 \times 10^{-23}$ kg is even larger.
5. Conclude that the value closest to the proton mass is \$1.67 \times 10^{-27}$ kg.