Question:
Which has the maximum electropositive character?
Which has the maximum electropositive character?
Show Hint
Electropositive character is highest for the element with the lowest ionisation enthalpy, which is the largest alkali metal.
Updated On: Nov 12, 2026
- \(\text{Cu}\)
- \(\text{Cs}\)
- \(\text{Ba}\)
- \(\text{Cr}\)
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Electropositive character is the tendency to lose electrons and form cations. It increases down a group and decreases across a period.
Step 2: Compare the elements
Cs is a group 1 metal in period 6. Ba is a group 2 metal in the same period. Cu and Cr are transition metals with high ionisation enthalpies.
Step 3: Conclusion
Cs has the largest size and the lowest ionisation enthalpy of the four, so it is the most electropositive.
Final Answer:
Caesium is the most electropositive element. \[ \boxed{\text{(B) }\text{Cs}} \]
Electropositive character is the tendency to lose electrons and form cations. It increases down a group and decreases across a period.
Step 2: Compare the elements
Cs is a group 1 metal in period 6. Ba is a group 2 metal in the same period. Cu and Cr are transition metals with high ionisation enthalpies.
Step 3: Conclusion
Cs has the largest size and the lowest ionisation enthalpy of the four, so it is the most electropositive.
Final Answer:
Caesium is the most electropositive element. \[ \boxed{\text{(B) }\text{Cs}} \]
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