SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mg because it gains an energy level
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Mg due to extra electron repulsion
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Mg2+ because of extra electron repulsion
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Mg2+ because it loses an energy level
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Detailed explanation-1: -Therefore, Mg2+ is smaller than the Mg atom.
Detailed explanation-2: -General Chemistry (1) The ionization energy of Mg+ is more than Mg. This is because the number of electrons in Mg+ is one less than its number of protons, hence its effective nuclear charge is more resulting in high ionization energy. The increasing order of ionization energy is Mg < Mg+.
Detailed explanation-3: -In, Magnesium having +2 charge which means magnesium loses 2 electrons. Therefore, the number of electrons is 12-2 = 10 .
Detailed explanation-4: -Mg is an atom of magnesium element. It is electrically neutral and has two electrons in its outermost or valence shell. Mg+2 is an ion of magnesium atom which has lost 2 electrons from its valence shell and has attained an electronic configuration of noble gas that is Neon and hence become positively charged.