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Krypton has an atomic number of 36 and a mass number of 84. Which statement describes a neutral atom of krypton?(1 point)

Responses

It has the same number of protons as electrons, but it has a greater number of neutrons.
It has the same number of protons as electrons, but it has a greater number of neutrons.

It has the same number of protons as electrons, but it has a lesser number of neutrons.
It has the same number of protons as electrons, but it has a lesser number of neutrons.

It has the same number of protons as neutrons, but it has a lesser number of electrons.
It has the same number of protons as neutrons, but it has a lesser number of electrons.

It has the same number of protons as neutrons, but it has a greater number of electrons.

1 answer

A neutral atom of krypton, which has an atomic number of 36 and a mass number of 84, has the following characteristics:

  • The atomic number (36) indicates that it has 36 protons.

  • For a neutral atom, the number of electrons is equal to the number of protons, so it also has 36 electrons.

  • The mass number (84) is the sum of protons and neutrons. Therefore, to find the number of neutrons, we subtract the number of protons from the mass number:

    Number of neutrons = Mass number - Atomic number Number of neutrons = 84 - 36 = 48

Thus, krypton has 36 protons, 36 electrons, and 48 neutrons.

From the provided statements, the correct one is:

It has the same number of protons as electrons, but it has a greater number of neutrons.