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27 December, 17:59

The mass of an electron is approximately 9 * 10-28 grams, while the mass of a neutron is approximately 2 * 10-24 grams. Which of the following is true?

The mass of a neutron is approximately 2,000 times the mass of an electron.

The mass of a neutron is approximately 10,000 times the mass of an electron.

The mass of a neutron is approximately 20,000 times the mass of an electron.

The mass of a neutron is approximately 1,000 times the mass of an electron.

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  1. 27 December, 18:13
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    We simply divide the Mass of Neutron by Mass of electron

    = 2 * 10⁻²⁴ / (9 * 10⁻²⁸)

    = (2/9) * 10⁻²⁴ ⁻ ⁻²⁸

    = (2/9) * 10⁻²⁴ ⁺ ²⁸

    ≈ 0.2222 ... * 10²⁸ ⁻ ²⁴

    ≈ 0.2222 * 10⁴

    ≈ 2222

    This is approximately 2000 times.

    So:

    The mass of a neutron is approximately 2,000 times the mass of an electron

    The first option. I hope this explains it.
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