Explain why the first ionization energy of Ca is greater than that of K, whereas

Question

Explain why the first ionization energy of Ca is greater than that of K, whereas the second ionization energy of Ca is lower than the second ionization energy of K (Select all that apply) When K loses one electron, it achieves a noble gas configuration. When K loses two electrons, it achieves a noble gas configuration. Removal of a second electron from Ca requires much additional energy Removal of a second electron from K requires When Ca loses one electron, it achieves a noble gas configuration. When Ca loses two electrons, it achieves a noble gas configuration. Arrange the following atoms or ions in order of decreasing ionization enrgy From largest to smallest ionization energy Drag and drop your selection from the following list to complete the answer: Sr2+ Br Rbt Se2

Explanation / Answer

.When K loses loses one electron, it achieves a noble gas configuration.

Removal of second electronfrom Ca require much additional energy.

When Ca loses two electrons, it acheive a noble gas configuration

The alkaline earth metals have higher first ionization energies than the alikali metals because the former group has a greater nuclear charge, which means that the valence electrons are bound to the atom more strongly. In general, this trend continues as you move from left to right across the periodic table.

Br->Se2->Rb+>Sr2+

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