Final answer:
The elements can be arranged in order of increasing electronegativity as follows: Rb, Cd, Ag, Rb, Xe.
Step-by-step explanation:
Electronegativity increases from lower left to upper right in the periodic table. Because Rb lies at the bottom-left of the rectangle formed by the six elements given, it will have the lowest electronegativity. Therefore, the elements can be arranged in order of increasing electronegativity as follows:
- Rb
- Cd
- Ag
- Rb
- Xe