Answer :
Final answer:
The electron configuration of a neutral magnesium atom is 1s² 2s² 2p⁶ 3s². The magnesium ion (Mg²+) has an electron configuration of 1s² 2s² 2p⁶, which is the same as that of neon. The likely charge of the magnesium ion is +2.
Explanation:
Electron Configurations for Magnesium
The electron configuration of a neutral magnesium (Mg) atom can be derived by following the Auf Bau principle, which states that electrons fill the lowest energy orbitals first. Therefore, for a neutral magnesium atom with 12 electrons, its configuration is:
1s² 2s² 2p⁶ 3s²
Electron Configuration of Magnesium Ion
When magnesium forms an ion, specifically the magnesium ion (Mg²+), it loses two electrons. The electron configuration for the magnesium ion is:
1s² 2s² 2p⁶
Element with the Same Electron Configuration as Mg²+
There is another element on the periodic table that has the same electron configuration as the Mg²+ ion. That element is neon (Ne), which also has the configuration:
1s² 2s² 2p⁶ (12 electrons)
Charge on the Magnesium Ion
The likely charge on the magnesium ion, after losing two electrons, is:
+2
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