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Which elements are not main-group elements?(a) Al(b) Br(c)

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 56P Chapter 4

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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1
Problem 56P

Which elements are not main-group elements?

(a) Al

(b) Br

(c) Mo

(d) Cs

(e) Pb

Step-by-Step Solution:

Solution 56P

Step 1:

Here, we have to determine which among the given elements are not main-group elements.

The main group elements consist of the first two columns (the hydrogen and beryllium columns) and the last six columns (the boron through helium columns). That is the elements found in groups 1, 2 and 13 to 18 are main group elements. 

In these elements, S- and p- electrons fill in a regular repeating manner. Hence, elements in the s- and p-blocks have predictable patterns that represent a wide range of properties. Therefore, the s- and p-block elements are called the main-group or representative elements.

The main group elements in the periodic table are shown below :

        

Step 2 of 2

Chapter 4, Problem 56P is Solved
Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

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Which elements are not main-group elements?(a) Al(b) Br(c)

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