Questions: 9) Which of the following descriptions of a subatomic particle is correct? A) A proton has a positive charge and a mass of approximately 1 amu . B) An electron has a negative charge and a mass of approximately 1 amu . C) A neutron has no charge and its mass is negligible. D) A proton has a positive charge and a negligible mass. E) A neutron has a positive charge and a mass of approximately 1 amu .

Solution Steps

• Option A: A proton has a positive charge and a mass of approximately 1 amu.

  • This is correct. Protons are positively charged and have a mass close to 1 atomic mass unit (amu).

• Option B: An electron has a negative charge and a mass of approximately 1 amu.

  • This is incorrect. Electrons have a negative charge, but their mass is much smaller than 1 amu (approximately \(0.0005\) amu).

• Option C: A neutron has no charge and its mass is negligible.

  • This is incorrect. Neutrons have no charge, but their mass is approximately 1 amu, not negligible.

• Option D: A proton has a positive charge and a negligible mass.

  • This is incorrect. Protons have a positive charge, but their mass is not negligible; it is approximately 1 amu.

• Option E: A neutron has a positive charge and a mass of approximately 1 amu.

  • This is incorrect. Neutrons have no charge and a mass of approximately 1 amu.

From the analysis, Option A is the only correct description of a subatomic particle.

Final Answer