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If the number of electrons in an ion Z3– is 10, the atomic number of element Z will be
  • a)
    7
  • b)
    5
  • c)
    10
  • d)
    8
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
If the number of electrons in an ion Z3– is 10, the atomic number of ...
Explanation:
An ion is formed when an atom gains or loses electrons. In the case of the ion Z3–, the negative superscript indicates that the ion has gained 3 extra electrons.

To determine the atomic number of element Z, we need to find the number of protons in the nucleus, which is equal to the atomic number.

Step 1: Find the number of electrons in the neutral atom
Since the ion Z3– has gained 3 extra electrons, the number of electrons in the neutral atom is 10 - 3 = 7.

Step 2: Identify the atomic number
The atomic number represents the number of protons in the nucleus of an atom. In a neutral atom, the number of protons is equal to the number of electrons. Therefore, the atomic number of element Z is 7, which is option A.

Summary:
In the ion Z3–, the number of electrons is 10. To find the atomic number of element Z, we subtract the number of extra electrons from the total number of electrons. In this case, the atomic number is 7, which corresponds to option A.
Free Test
Community Answer
If the number of electrons in an ion Z3– is 10, the atomic number of ...
Z ⟶ Z3– means it gains three electrons
Atomic number = no. of electrons
So, the atomic number of element Z is = 7
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