Explanation Element: An element is a simplest type of a pure substance which is composed of only one type of matter. For example, silver, gold, platinum etc. Valence electron: The electrons which are present in the outer most energy level are known as Valence electron. This can be calculated by the group number of the element. Generally the group number is same as the Valence electrons of any elements. Electron configuration: The arrangement of electrons in an atom by a superscript, in each sublevel is known as electron configuration. For example the d block elements have ( n − 1 ) d 1 − 10 n s 0 − 2 electronic configuration Lewis symbol represent the valence electrons of an atom. Sulfur The electron configuration of sulfur -16 is as follows: S − 16 : 1 s 2 2 s 2 2 p 6 3 s 2 3 p 4 2 , 8 , 6 Thus there are 6 valence electrons; hence the group number is also 6A. The Lewis symbol for S-16 is as follows: : S . . : Nitrogen The electron configuration of Nitrogen- 7 is as follows: N − 7 : 1 s 2 2 s 2 2 p 3 2 , 5 Thus there are 5 valence electrons; hence the group number is also 5A. The Lewis symbol for N-5 is as follows: : N

CHEMISTRY: AN INTRODUCTION TO GENERAL, O

13th Edition

ISBN: 9780137444298

Author: Timberlake

Publisher: PEARSON

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.

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Chapter 4.7, Problem 4.55PP

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To determine: The group number and draw Lewis symbol for given elements:

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Chapter 4.7, Problem 4.54PP

Chapter 4.7, Problem 4.56PP

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CHEMISTRY: AN INTRODUCTION TO GENERAL, O

Ch. 4.1 - Write the symbols for the following elements. a....Ch. 4.1 - Prob. 4.2PP Ch. 4.1 - 4.3 Write the name for the symbol of each of the...Ch. 4.1 - Prob. 4.4PP Ch. 4.1 - Prob. 4.5PP Ch. 4.1 - Prob. 4.6PP Ch. 4.2 - 4.7 Identify the group or period number described...Ch. 4.2 - 4.8 Identify the group or period number described...Ch. 4.2 - Prob. 4.9PP Ch. 4.2 - 4.10 Give the symbol of the element described by...

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