With the aid of a periodic table (not Figure 9.15 ), arrange...

With the aid of a periodic table (not Figure $9.15$ ), arrange the following in order of increasing electronegativity:
a. $\mathrm{Sr}, \mathrm{Ca}, \mathrm{Rb}$
b. $\mathrm{Ca}, \mathrm{Ge}, \mathrm{Ga}$
c. Se, As, $\mathrm{Sb}$

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Key Concepts

Electronegativity

Electronegativity is a measure of an atom's ability to attract and bind with electrons when forming a chemical bond. It is a fundamental concept in chemistry that influences bond polarity and the behavior of molecules in chemical reactions.

Periodic Trends

Periodic trends refer to the regular changes in elemental properties as you move across periods and down groups in the periodic table. In the context of electronegativity, the values tend to increase as you move from left to right across a period, due to the increasing effective nuclear charge, and decrease as you move down a group because of the increasing distance between the nucleus and the valence electrons.

Using the Periodic Table

The periodic table organizes elements in a way that reveals trends in properties such as electronegativity. By examining an element's position—in terms of its period and group—you can predict its relative electronegativity compared to other elements. This method is useful for arranging elements in order of increasing or decreasing electronegativity.

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