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Which of the sequence regarding first IP of coinage metal is correct?

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$Cu > Ag > Au$

$Ag > Cu > Au$

$\begin{array}{r} Cu > Ag < Au \end{array}$

$\begin{aligned} Cu < Ag < Au \end{aligned}$

answer is C.

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Detailed Solution

The sequence regarding the first IP of coinage metal is $Cu > Ag > Au$

As the distance between the valence electron and the nucleus increases and the effective nuclear charge decreases

It is predicted that the ionization energy of the elements would fall along the group.
Consequently, gold will require the least energy to ionize one electron

Consequently, the order of coinage metals' ionization potential is $Cu > Ag > Au$

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