   Chapter 7.3, Problem 7.1CYU

Chapter
Section
Textbook Problem

(a) What element has the configuration 1s22s22p63s2ps?(b) Using spdf notation and an orbital box diagram, show the electron configuration of phosphorus.

(a)

Interpretation Introduction

Interpretation:

The unknown element that has given electronic configurations has to be identified.

Concept Introduction:

Electronic configuration: The electronic configuration is the distribution of electrons (e-) of an given molecule or respective atoms in atomic or molecular orbitals.

The important there rules for electronic configuration given below:

Aufbau principle: This rule statues that ground state of an atom or ions electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels. If consider the 1s shell is filled the 2s subshell is occupied.

Hund's Rule: The every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.

Pauli exclusion rule: an atomic orbital may describe at most two electrons, each with opposite spin direction.

Explanation

According to the electronic configuration, the given element is chlorine (Cl) atoms

Atomic number of chlorine atom=16Electronicconfigurationof(Cl)=1s22s22p43s23p5spdfwith noble gas notation=[Ne]3s23p5Orbitalboxnotation       = [Ne]

(b)

Interpretation Introduction

Interpretation:

The electronic configuration of phosphorus has to be identified.

Concept Introduction:

Electronic configuration: The electronic configuration is the distribution of electrons (e-) of an given molecule or respective atoms in atomic or molecular orbitals.

The important there rules for electronic configuration given below:

Aufbau principle: This rule statues that ground state of an atom or ions electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels. If consider the 1s shell is filled the 2s subshell is occupied.

Hund's Rule: The every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.

Pauli exclusion rule: an atomic orbital may describe at most two electrons, each with opposite spin direction.

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