Answered: Decide which element has the greater…

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter2: Atoms Molecules And Ions

Section2.5: The Periodic Table

Problem 2RC

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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

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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