Interpretation: The elements are to be arranged in order of increasing atomic radius.
Concept introduction: Atomic radius is the total distance from the center of the nuclei to the outermost shell which contains the electron.
Atomic radius decreases as we move across a period and atomic radius increases as we move down a group.
Answer to Problem 109A
The order of the increasing atomic radius will be: Germanium >Arsenic > Phosphorous
Explanation of Solution
As we move across a period, the
However, on moving down a group, the atomic number of the element increases but now the electrons are added in new shells and thus effective nuclear charge decreases leading to an increase in atomic radius.
As Arsenic (As) lies below phosphorous (P) in the same group, thus Arsenic has a larger atomic radius than phosphorous (P). Germanium (Ge) lies to the left of Arsenic (As), thus, the atomic radius of Germanium (Ge) is larger than that of Arsenic (As).
Thus, the order of the increasing atomic radius will be Germanium >Arsenic > Phosphorous
Chapter 17 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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