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Which of the following have the same number of electrons in outermost shell?
  • a)
    Elements with atomic numbers 30,48, 80
  • b)
    Elements with atomic numbers 14, 15,16
  • c)
    Elements with atomic numbers 20, 30, 50
  • d)
    Elements with atomi numbers 10, 18, 26
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which of the following have the same number of electrons in outermost ...
Element with atomic number 30 ; [Ar] 3d10 4s2
Element with atomic number 48 ; [Kr] 4d10 5s2
Element with atomic number 80; [Xe] 4f145d106s2
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Most Upvoted Answer
Which of the following have the same number of electrons in outermost ...
Elements with the same number of electrons in outermost shell:
Elements with atomic numbers 30, 48, 80 have the same number of electrons in their outermost shell.

Explanation:

Atomic Number 30 (Zinc):
- Zinc has an atomic number of 30.
- In the electronic configuration of Zinc, the last electron enters the 4s orbital.
- Therefore, Zinc has 2 electrons in its outermost shell.

Atomic Number 48 (Cadmium):
- Cadmium has an atomic number of 48.
- The electronic configuration of Cadmium shows that the last electron enters the 5s orbital.
- Hence, Cadmium also has 2 electrons in its outermost shell.

Atomic Number 80 (Mercury):
- Mercury has an atomic number of 80.
- In the electronic configuration of Mercury, the last electron enters the 6s orbital.
- Thus, Mercury also has 2 electrons in its outermost shell.
Therefore, elements with atomic numbers 30 (Zinc), 48 (Cadmium), and 80 (Mercury) have the same number of electrons in their outermost shell, which is 2.
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Which of the following have the same number of electrons in outermost shell?a)Elements with atomic numbers 30,48, 80b)Elements with atomic numbers 14, 15,16c)Elements with atomic numbers 20, 30, 50d)Elements with atomi numbers 10, 18, 26Correct answer is option 'A'. Can you explain this answer?
Question Description
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