Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question
Decide which element has the greater size and defend your answer: (i) B or Si; (ii) C or P
Expert Solution
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Step 1

Size of atom decreases along a period from left to right. 

Because the number of protons increases from left to right, so effective nuclear charge increases, and nucleus pull the outermost electrons strongly, and so the radius decreases.

And when we go down a group, a new shell is added, so effective nuclear charge decreases, and thus size increases. 

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