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16 June, 05:59

What is the correct noble gas configuration for magnesium?

a) Ne [3s2

b) [Ar] 3s2

c) [Ne] 3s23p2

d) [He] 2s2

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Answers (1)
  1. 16 June, 07:49
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    To determine the noble gas configuration, we need to identify magnesium's atomic number. Magnesium has an atomic number of 12. The nearest noble gas is neon which has an atomic number of 10. This means two electrons more is needed to complete magnesium's configuration. The answer hence is A.
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