Science
easyQ. No. 15069-what-is-the-approximate-mass-of-a-proton
What is the approximate mass of a proton?
Last Updated:
A9.1 × 10⁻²⁷ kg
B9.1 × 10⁻³¹ kg
C1.67 × 10⁻²⁷ kg
D1.67 × 10⁻³¹ kg
Correct Answer: 1.67 × 10⁻²⁷ kgYour Answer: C
Explanation
A proton is a positively charged subatomic particle found in the nucleus of every atom. Its mass is approximately 1.67 × 10⁻²⁷ kg (more precisely 1.6726 × 10⁻²⁷ kg). The proton is about 1836 times heavier than the electron. Option A (9.1 × 10⁻²⁷ kg): This is not a standard particle mass value. Option B (9.1 × 10⁻³¹ kg): This is the mass of an ELECTRON, not a proton. While the coefficient 1.67 is correct for proton, the exponent should be -27, not -31.
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