Which of the following atoms has the lowest ionization potential ?
A
`""_(7)^(14) N`
B
`""_(55)^(133) Cs`
C
`""_(18)^(40) Ar`
D
`""_(8)^(16) O`
Text Solution
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The correct Answer is:
B
The ionisation potential increase from left to right in a period and decrease from top to bottom in a group .Therefore ceasium will have the lowest ionisation potential
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