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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Specify the number of valence electrons for Li, Ti, Zn, Si, and Cl.

Interpretation Introduction

Interpretation: It should be determined for the specific number of valence electron for Li,Ti,Zn,Si and Cl atom.

Concept Introduction:

Electronic configuration: It is used to denote the distribution of electrons placed over orbitals that present in the atom.

The rules followed by the electrons are as follows,

The electrons gets distributed strictly following the order starting from lower energy orbital to higher energy orbital(Aufbau principle), pairing of electrons in subshell starts only when all the orbitals in the subshell are singly filled (Hund’s Rule) and finally, no two electrons that have same set of quantum numbers (Pauli’s Exclusion Principle).

Valence electron: The electron is considered as valence electron if it present in outermost shell of atom which gets involved in the formation of chemical bond.

Explanation

Element No. Of Valence eLi 1Ti 4Zn 2Si 4Cl 7

The electronic configuration of Li is He[2s1].  The number of valence electron present in Li is 1 since its outer most orbital (valence shell) contain one.

The electronic configuration of Ti is Ar[3d24s2].  The number of valence electrons present in Ti are 4 since its outer most orbital (valence shell) contains it

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