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8. Number of protons, neutrons & electrons in the element 89Y231 is:

(A) 89, 231, 89
(B) 89, 89, 242
(C) 89, 142, 89
(D) 89, 71, 89

Answer :

To determine the number of protons, neutrons, and electrons in the element [tex]^{231}_{89}\text{Y}[/tex], we need to understand what these numbers mean:

  1. Protons: The number of protons in an element is represented by its atomic number. In the symbol [tex]^{231}_{89}\text{Y}[/tex], the number 89 is the atomic number, which means there are 89 protons.

  2. Electrons: In a neutral atom, the number of electrons is equal to the number of protons. Therefore, there are also 89 electrons.

  3. Neutrons: The number of neutrons can be determined by subtracting the atomic number (number of protons) from the mass number. The mass number (231) is the total count of protons and neutrons in the nucleus.

    [tex]\text{Number of Neutrons} = \text{Mass Number} - \text{Atomic Number} = 231 - 89 = 142[/tex]

Thus, the element [tex]^{231}_{89}\text{Y}[/tex] has:

  • 89 protons,
  • 89 electrons, and
  • 142 neutrons.

Therefore, the correct option is (C) 89, 142, 89.

Thanks for taking the time to read 8 Number of protons neutrons electrons in the element 89Y231 is A 89 231 89 B 89 89 242 C 89 142 89 D 89. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

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