Class 11 Chemistry Chapter 2 | Structure of Atom | Important Questions & Concepts| Parmanu Sanrachna

Prepare for your Class 11 Chemistry exams with this comprehensive session on Chapter 2: Structure of Atom (Parmanu Sanrachna). In this video, we continue with important questions and concepts, focusing on electronic configurations, quantum numbers, and atomic models.

We cover key topics including isotopes, electronic configuration of ions, quantum numbers, Heisenberg's Uncertainty Principle, de Broglie's relation, and the shapes of orbitals.

Key Topics Covered:
- Isotopes and Isobars
- Electronic configuration of ions (e.g., Fe3+)
- Quantum Numbers (Principal, Azimuthal, Magnetic, Spin)
- Heisenberg's Uncertainty Principle & de Broglie's Equation
- Shapes of s, p, d, f orbitals
- Rules for filling electrons: Aufbau Principle, Pauli Exclusion Principle, Hund's Rule
- Hydrogen Spectrum (Lyman, Balmer series)
- Planck's Quantum Theory & Photoelectric Effect

Chemical Concepts Discussed:
- Electronic configuration of Fe3+ (Argon core, 3d5)
- Significance of Quantum Numbers (n, l, m, s)
- Relationship between c, v, and λ (c = vλ)
- Nodal planes and probability density
- Energy of orbitals (n+l rule)

Make sure to watch the full video to clear your doubts and strengthen your chemistry concepts.

Timestamps:
00:00:00 Introduction & Recap
00:01:49 Q25: What is same in Isotopes? (Protons)
00:02:18 Q26: Number of unpaired electrons in Fe3+ (5)
00:04:39 Q27: Quantum number l=2 represents which subshell? (d-subshell)
00:06:10 Q28: Formula for maximum electrons in a shell (2n²)
00:08:29 Q29: Relation between speed of light, frequency, and wavelength (c = vλ)
00:09:20 Q30: Probability of finding an electron at a nodal surface (Zero)
00:10:42 Q31: Number of radial nodes in 2s orbital (n-l-1 = 1)
00:11:51 Q32: Lyman series of Hydrogen spectrum lies in which region? (Ultraviolet)
00:13:04 Q33: Numerical: Energy of a photon with wavelength 400 nm (approx 3.1 eV)
00:17:05 Q34: Particle not present in the nucleus of Hydrogen (Protium)? (Neutron)
00:18:13 Q35: Effect on de Broglie wavelength if velocity is doubled (Halved)
00:20:21 Q36: What are Degenerate Orbitals? (Orbitals with same energy)
00:22:02 Q37: According to Hund's Rule, when does pairing start? (After each orbital is singly occupied)
00:23:18 Q38: Designation of orbital with n=4, l=1 (4p)
00:24:45 Q39: 17Cl35 and 17Cl37 are examples of? (Isotopes)
00:26:14 Q40: Value of Planck's Constant (h) (6.626 x 10^-34 Js)
00:27:38 Q41: Quantum numbers for the last electron of Sodium (n=3, l=0, m=0, s=+1/2)
00:30:49 Q42: Which transition in Hydrogen spectrum emits maximum energy? (n=2 to n=1)
00:33:03 Q43: What does Ψ² represent in Schrödinger equation? (Probability density)
00:33:45 Q44: Meaning of the word 'Aufbau' (Building up)
00:35:16 Q45: Ion with electronic configuration similar to Argon (K+)
00:38:12 Q46: Select the pair of isoelectronic species (Na+ and Mg2+)
00:40:52 Q47: Arrange orbitals in decreasing order of energy using (n+l) rule
00:43:19 Q48: Who correctly explained Black Body Radiation? (Max Planck)
00:44:01 Q49: In which orbital is electron density zero at the nucleus? (p, d, f)
00:45:17 Q50: Bohr's Model is applicable to? (Single electron species like H, He+, Li2+)
00:48:43 Conclusion & Future Class Plans

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Видео Class 11 Chemistry Chapter 2 | Structure of Atom | Important Questions & Concepts| Parmanu Sanrachna канала Praveen Joshi Classes