The Valence Electrons of an Atom of Which Element would feel a Greater Effective Nuclear Charge than the Valence?
The Valence Electrons of an Atom of which element would feel a greater effective Nuclear Charge than the valence electrons of a Boron (B) atom?

Aluminum (Al)
Beryllium (Be)
Hydrogen (H)
Carbon (C)

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ScarlettFighterX ScarlettFighterX

31-07-2017
Chemistry

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The Valence Electrons of an Atom of Which Element would feel a Greater Effective Nuclear Charge than the Valence?
The Valence Electrons of an Atom of which element would feel a greater effective Nuclear Charge than the valence electrons of a Boron (B) atom?

Aluminum (Al)
Beryllium (Be)
Hydrogen (H)
Carbon (C)

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meerkat18 meerkat18 · Answer 1 · 2017-08-11T12:37:52+02:00

The effective nuclear charge is an innate property of a specific element. It is the pull of force that an electron feels from the nucleus. It is related to the valence electron by the equation: Z* = Z-S, where Z* is the effective nuclear charge, Z is the atomic number and S is the shielding constant.

For the following elements in the choices, these are their values of Z*:

Aluminum - +12.591
Beryllium - +1.912
Hydrogen - +1
Carbon - +4

The effective nuclear charge of Boron is +3. Thus, the answers are Aluminum and Carbon.