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23 January, 11:17

Which statement about protons is false?

1. Protons have the same magnitude of charge as electrons but are opposite in sign.

2. Protons have about the same mass as neutrons.

3. All atoms have protons.

4. Protons have about the same mass as electrons.

Only one can be selected.

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Answers (1)
  1. 23 January, 12:27
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    Answer: The correct answer is Option 4.

    Explanation:

    There are three sub-atomic particles present in an atom. They are: electrons, protons and neutrons.

    Protons constitute in each and every atom.

    The charge on proton is of equal magnitude as that of electron but having opposite sign. Proton carry a positive charge and electron carry a negative charge.

    Protons and neutrons, both determine the mass of an atom.

    Mass of 1 proton = 1.007276 u

    Mass of 1 neutron = 1.008664 u

    Mass of 1 electron = 0.00054858 u

    Mass of proton is almost same as that of neutron but is more than the mass of electron.

    Hence, the correct answer is Option 4.
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