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The Bromine Atom Possesses 35 Electrons. It Contains 6 Electrons in 2p Orbital, 6 Electrons in 3p Orbital and 5 Electrons in 4p Orbital. Which of These Electron Experiences the Lowest Effective Nuclear Charge? - CBSE (Science) Class 11 - Chemistry

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Question

The bromine atom possesses 35 electrons. It contains 6 electrons in 2p orbital, 6 electrons in 3p orbital and 5 electrons in 4p orbital. Which of these electron experiences the lowest effective nuclear charge?

Solution 1

Nuclear charge experienced by an electron (present in a multi-electron atom) is dependant upon the distance between the nucleus and the orbital, in which the electron is present. As the distance increases, the effective nuclear charge also decreases.

Among p-orbitals, 4p orbitals are farthest from the nucleus of bromine atom with (+35) charge. Hence, the electrons in the 4p orbital will experience the lowest effective nuclear charge. These electrons are shielded by electrons present in the 2p and 3porbitals along with the s-orbitals. Therefore, they will experience the lowest nuclear charge.

Solution 2

4p electrons, being farthest from the nucleus experience the lowest effective nuclear charge.

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Solution The Bromine Atom Possesses 35 Electrons. It Contains 6 Electrons in 2p Orbital, 6 Electrons in 3p Orbital and 5 Electrons in 4p Orbital. Which of These Electron Experiences the Lowest Effective Nuclear Charge? Concept: Quantum Mechanical Model of the Atom - Energies of Orbitals.
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