In introductory chemistry, what is the approximate mass of a neutron?

• A. About $1\times {10}^{-27}$ g (approximately $1000$ amu)
• B. About $1\times {10}^{-24}$ g (approximately $1$ amu)
• C. About $9.11\times {10}^{-28}$ g (approximately $0.00055$ amu)
• D. About $1.67\times {10}^{-28}$ g (approximately $0.10$ amu)

Answer: (B)