Change set
Pick exam & year, then Go.
Question map
Not attempted
Correct
Incorrect
★
Bookmarked
Loading…
Q113
(NDA-II/2024)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
Official Key
What is the maximum number of electrons that can occupy the first shell of an atom ?
Result
Your answer:
—
·
Correct:
A
Explanation
The distribution of electrons in different orbits or shells of an atom is governed by the Bohr-Bury scheme. According to this rule, the maximum number of electrons that can be accommodated in a shell is given by the formula 2n2, where 'n' is the orbit number or energy level index.
- For the first shell (K shell), n = 1.
- Applying the formula: 2 × (1)2 = 2 × 1 = 2.
Therefore, the maximum number of electrons that can occupy the first shell is 2. For comparison, the second shell (L shell, n=2) can hold a maximum of 8 electrons (2 × 22), and the third shell (M shell, n=3) can hold up to 18 electrons (2 × 32).
How others answered
Each bar shows the % of students who chose that option.
Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
88%
got it right
✓ Thank you! We'll review this.
SIMILAR QUESTIONS
The number of maximum electrons in N shell is
What is the maximum number of electrons in the M-Shell ?
For an element with atomic number 35, which one of the following will be the correct number of electrons in its valence shell based on Bohr’s model of an atom?
There are six electrons, six protons and six neutrons in an atom of an element. What is the atomic number of the element ?
Number of electrons present in the species H₂⁺, He, H₂ and O₂⁺ respectively are :