An atom is described as having the electron configuration, [Ar] 4s2 3d5 4f 2. Which element is it?
A) one of the chalcogen family
B) one of the halogen family
C) one of the alkaline earth family
D) one of the lanthanide elements
E) There is no element which fits the description listed above.
Correct Answer:
Verified
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Q90: Which configuration represents an alkaline earth element?
A)[Ar]
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