Which best describes how magnesium (Mg) and oxygen (O) bond? (3 points)They form an ionic bond by exchanging two electrons.They form an ionic bond by exchanging three electrons.They form a covalent bond by sharing one electron.They form a covalent bond by sharing four electrons.
Question
Which best describes how magnesium (Mg) and oxygen (O) bond? (3 points)They form an ionic bond by exchanging two electrons.They form an ionic bond by exchanging three electrons.They form a covalent bond by sharing one electron.They form a covalent bond by sharing four electrons.
Solution
Magnesium (Mg) and oxygen (O) form an ionic bond by exchanging two electrons. Here's the step-by-step process:
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Magnesium has two valence electrons (the electrons in the outermost shell of an atom that can participate in forming chemical bonds with other atoms).
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Oxygen, on the other hand, has six valence electrons but needs two more to complete its outer shell (to reach the stable electron configuration of the nearest noble gas, Neon).
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Magnesium, wanting to achieve a stable electron configuration, will lose its two valence electrons.
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These two electrons are then gained by oxygen, which needs two more electrons to achieve a stable electron configuration.
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This exchange of electrons - Magnesium losing two and oxygen gaining two - results in the formation of an ionic bond.
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Magnesium becomes a positively charged ion (Mg2+), and oxygen becomes a negatively charged ion (O2-). The electrostatic attraction between these oppositely charged ions forms the ionic bond.
So, the statement "They form an ionic bond by exchanging two electrons" best describes how magnesium and oxygen bond.
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