Doubtclip is an AI tutor that turns any homework or exam doubt into a step-by-step whiteboard video lesson with diagrams, formulas, and voice explanation.

Which subjects and exams does it support?

It supports Physics, Chemistry, Mathematics/Calculus and related STEM doubts for school boards, JEE, NEET, and global high-school / undergrad practice.

How do I get a video solution?

Upload a photo of the question or paste the text, sign in, and Doubtclip generates a whiteboard-style explanation video you can watch and share.

Is Doubtclip available worldwide?

Yes. Doubtclip is a web app for students globally. Lessons are available in English and Hinglish.

Atomic Structure

JEE Main level, single correct, medium

1 of 2

Question 1 of 2

The maximum number of electrons that can be accommodated in a principal shell with $n=3$ is:

Show answer and solution

Answer: (A) 18

Maximum electrons in shell

n

2n^2 = 2(3^2) = 18

JEE Main question paper PDF

Open a shift to read the full paper on this page, or download it.

JEE Main 2025 Apr 2 Shift 1 question paper

Open Download PDF

Opening paper…

Explain it as a whiteboard videoStep-by-step, in Hinglish or English. Your first video needs no login.Solved it on paper but got it wrong?Upload a photo of your working. Mistake Doctor marks the exact line that broke.

See it move: Hydrogen spectrum (Bohr model) simulationDrag the sliders and watch the numbers in this question change.

More Chemistry practice

Atomic StructureThe maximum number of electrons in a subshell with azimuthal quantum number $l=2$ (d-subshell) is:
Chemical BondingAccording to Molecular Orbital Theory, which of the following species has the highest bond order?
Coordination CompoundsThe magnetic moment of $[Fe(CN)_6]^{3-}$ complex ion according to spin-only formula is approximately:
Organic ChemistryToluene on reaction with $CrO_2Cl_2$ in $CS_2$ followed by hydrolysis gives benzaldehyde. This reaction is known as:
Chemical KineticsFor a first order reaction, the time required for $99.9\%$ completion is related to its half-life $t_{1/2}$ by:
ThermodynamicsA reaction is spontaneous at all temperatures if:

JEE Main Chemistry practice question on Atomic Structure, with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.

The maximum number of electrons that can be accommodated in a principal shell with n=3n=3n=3 is:

JEE Main question paper PDF

More Chemistry practice

The maximum number of electrons that can be accommodated in a principal shell with $n=3$ is: