Which of the following is closest to the mass of an electron?

• A. 9.11 \times 10^{-28} \text{ g}
• B. 1.67 \times 10^{-27} \text{ kg}
• C. 1.67 \times 10^{-24} \text{ g}
• D. 9.11 \times 10^{-31} \text{ kg}

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the units involved. The mass of an electron is commonly given in kilograms (kg) or grams (g). Make sure to compare masses in the same unit system for accuracy.
2. Step 2: Recall the known mass of an electron, which is approximately \$9.11 \times 10^{-31}$ kg. This is a fundamental constant in chemistry and physics.
3. Step 3: Convert the given options to the same unit for comparison. For example, convert grams to kilograms by using the conversion factor \$1 \text{ g} = 10^{-3} \text{ kg}$.
4. Step 4: After converting, compare each option's magnitude to \$9.11 \times 10^{-31}$ kg to see which is closest. Pay attention to the powers of ten, as they indicate the scale of the mass.
5. Step 5: Identify the option whose value is closest to \$9.11 \times 10^{-31}$ kg after unit conversion. This will be the correct answer representing the mass of an electron.