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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

Write one possible set of quantum numbers for the valence electrons of calcium.

Interpretation Introduction

Interpretation:

One possible set of quantum numbers for the valence electrons of calcium has to be written.

Concept Introduction:

Electronic configuration: The electronic configuration is the distribution of electrons (e-) of a given molecule or respective atoms in atomic or molecular orbitals. We consider the electronic configuration of neon atom is 1s22s22p6, the electronic configurations describes each electrons as moving independently orbitals, an average filed created ay all other orbitals.

Quantum numbers: These terms are explained for the distribution of electron density in an atom. They are derived from the mathematical solution of Schrodinger’s equation for the hydrogen atom. The types of quantum numbers are the principal quantum number (n), the angular momentum quantum number (l), the magnetic quantum number (ml) and the electron spin quantum number (ms). Each atomic orbital in an atom is categorized by a unique set of the quantum numbers.

Explanation

Electronic configuration method: The periodic tables clearly explain the calcium (Ca) atomic number (Z =20) is the fourth alkaline element after the noble gas argon (Ar).

Hence the (Ca) is the fourth element in the period, it has two electrons with n=2. Two electrons are assigned to (2s) and remaining electrons is assigned to (3p) electron shells the all p-electrons are empty shells there is no electrons.

So the element is precedes by the noble gas argon, so the electron configuration is [Ar]4s2. The electronic configuration notations methods are shown below.

    AtomicnumberofCalcium(Ca)= 20spdfwith noble gas notation=[Ar]4s2Orbitalboxnotation       = [Ar]

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