The number of radial nodes in a 3s orbital is:
A0
B1
C2
D3
Answer & Solution
Correct answer: C. 2
1. Total nodes = n − 1; angular nodes = ℓ; radial nodes = n − 1 − ℓ.
2. For 3s: n = 3, ℓ = 0, so radial nodes = 3 − 1 − 0 = 2.
3. Plus 0 angular nodes (s orbital is spherical).
_Source: NCERT Class 11 Chem Ch 2 §2.6 (radial / angular nodes)_
Related questions
An electron and a proton have the same kinetic energy. Which has the larger de Broglie wavHund's rule states that for degenerate orbitals of a subshell, electronsThe Aufbau principle states that electrons fill atomic orbitalsThe four quantum numbers (n, l, m_l, m_s) fully specify an electron in an atom. The magnetHeisenberg's uncertainty principle statesThe de Broglie wavelength associated with a particle of mass m and velocity v isFor a hydrogen-like ion of atomic number Z, the energy of the nth level isThe relationship E = hν (Planck) between photon energy and frequency contains constant h t