From the alkaline earth metal group name the following:
metal having highest ionization energy.

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Solution

Ionization energy is the energy required to remove an electron from the outer shell.
Alkaline earth metals are the elements present in the second group of the periodic table.
The elements are Beryllium (Be), Magnesium (Mg), Calcium(Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).
The periodic trend:
The ionization energy decreases from top to bottom along with a group. Hence the element present at the topmost position in a group has the highest ionization energy in that group. Hence, the highest ionization energy in group II is Beryllium.

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From the alkaline earth metal group name the following:metal having highest ionization energy.

From the alkaline earth metal group name the following:
metal having highest ionization energy.