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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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An unknown element is a nonmetal and has a valence-electron configuration of n s 2 n p 4 .

How many valence electrons does this element have?

. Possible identities for this element include which of the following?

msp;  C L ,   S ,   P b ,   S e ,   C r

Interpretation Introduction

(a)

Interpretation:

The number of valence electrons in the unknown element is to be identified.

Concept Introduction:

The electrons present in the outermost shell are referred to as valence electrons. The electrons which are present in inner shells are known as core electrons. They do not take part in the chemical reactions.

Explanation

The electronic configuration describes the number of electrons present in each shell of the element. The atomic number is found by adding all the electrons present in each shell.

The given valence electron configuration of the unknown element is ns2np4

Interpretation Introduction

(b)

Interpretation:

The possible element that is a nonmetal and has a valence electronic configuration of ns2np4 is to be identified.

Concept Introduction:

The electrons present in the outermost shell are referred to as valence electrons. The electrons which are present in inner shells are known as core electrons. They do not take part in the chemical reactions.

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