Statement 1: Transition elements in a particular period may have the same oxidation number.
Statement 2: They have a complete outer energy level.

Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

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Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.

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Statement 1 is correct but Statement 2 is not correct.

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Statement 1 is not correct but Statement 2 is correct.

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Both the Statement 1 and Statement 2 are not correct.

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Solution

The correct option is C Statement 1 is correct but Statement 2 is not correct.
Statement 1: Transition elements in a particular period may have the same oxidation number.
Statement 2: They have incomplete outer energy level.
The valence shell electronic configuration of transition elements is $(n - 1) d n s$ . Thus, nth level has only one or two electrons in s subshell.
Statement 1 is correct but Statement 2 is not correct.

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Statement 1: Transition elements in a particular period may have the same oxidation number.Statement 2: They have a complete outer energy level.

Statement 1: Transition elements in a particular period may have the same oxidation number.
Statement 2: They have a complete outer energy level.