Which one is the wrong statement?
- AThe uncertainty principle is $\Delta E \times \Delta t \geq \frac{h}{4\pi}$
- BHalf-filled and fully-filled orbitals have greater stability due to greater exchange energy,greater symmetry,and more balanced arrangement.
- CThe energy of $2s$ orbital is less than the energy of $2p$ orbital in case of hydrogen-like atoms.
- Dde-Broglie's wavelength is given by $\lambda = \frac{h}{mv}$,where $m =$ mass of the particle,$v =$ group velocity of the particle.
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Similar Questions
Which one of the following about an electron occupying the $1s$ orbital in a hydrogen atom is incorrect? (Bohr's radius is represented by $a_0$)
DifficultJEE MAIN 2025
View SolutionMatch the items in Column-$A$ with the items in Column-$B$.
Column-$A$ Column-$B$ $(1)$ Dalton $(A)$ Photoelectric effect $(2)$ Maxwell $(B)$ Wave theory $(3)$ Huygens $(C)$ Atomic theory $(D)$ Electromagnetic radiation
| Column-$A$ | Column-$B$ |
| $(1)$ Dalton | $(A)$ Photoelectric effect |
| $(2)$ Maxwell | $(B)$ Wave theory |
| $(3)$ Huygens | $(C)$ Atomic theory |
| $(D)$ Electromagnetic radiation |
Easy
View SolutionMatch the following laws with their correct statements:
Laws Statements $(1)$ Hund's Rule $(A)$ No two electrons in an atom can have the same set of all four quantum numbers. $(2)$ Aufbau Principle $(B)$ Half-filled and fully-filled orbitals have greater stability. $(3)$ Pauli Exclusion Principle $(C)$ Electrons prefer to remain unpaired in degenerate orbitals first. $(4)$ Heisenberg's Uncertainty Principle $(D)$ It is impossible to determine simultaneously the exact position and exact momentum of an electron. $(E)$ In the ground state of atoms,orbitals are filled in the order of increasing energy.
| Laws | Statements |
|---|---|
| $(1)$ Hund's Rule | $(A)$ No two electrons in an atom can have the same set of all four quantum numbers. |
| $(2)$ Aufbau Principle | $(B)$ Half-filled and fully-filled orbitals have greater stability. |
| $(3)$ Pauli Exclusion Principle | $(C)$ Electrons prefer to remain unpaired in degenerate orbitals first. |
| $(4)$ Heisenberg's Uncertainty Principle | $(D)$ It is impossible to determine simultaneously the exact position and exact momentum of an electron. |
| $(E)$ In the ground state of atoms,orbitals are filled in the order of increasing energy. |
Medium
View SolutionMatch the following columns:
Column-$I$ Column-$II$ $(1)$ Photon $(A)$ Value of $4$ for $N$ shell $(2)$ Electron $(B)$ Probability density $(3)$ $\psi^2$ $(C)$ Always $+$ value $(4)$ Principal quantum number $(n)$ $(D)$ Represents wavelength and momentum
| Column-$I$ | Column-$II$ |
|---|---|
| $(1)$ Photon | $(A)$ Value of $4$ for $N$ shell |
| $(2)$ Electron | $(B)$ Probability density |
| $(3)$ $\psi^2$ | $(C)$ Always $+$ value |
| $(4)$ Principal quantum number $(n)$ | $(D)$ Represents wavelength and momentum |
Medium
View SolutionIn $H$ atom,an orbit has a diameter of about $16.92 \ \mathring{A}$. What is the maximum number of electrons that can be accommodated in this orbit?
Medium
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