Assertion : The 4f-and 5f-inner transition series of elements are placed separately at…
Chemistry · JEE Advanced · NTA Exams — Classification of Elements and Periodicity in Properties
Assertion : The 4f-and 5f-inner transition series of elements are placed separately at the bottom of the periodic table.
Reason : (i) This prevents the undue expansion of the periodic table i.e., maintains its structure. (ii) This preserve the principles of classification by keeping elements with similar properties in a single column.
Reason : (i) This prevents the undue expansion of the periodic table i.e., maintains its structure. (ii) This preserve the principles of classification by keeping elements with similar properties in a single column.
- If both assertion and reason are correct and reason is the correct explanation of assertion.
- If both assertion and reason are true but reason is not the correct explanation of assertion.
- If assertion is true but reason is false.
- If assertion is false but reason is true.
Answer
(A) If both assertion and reason are correct and reason is the correct explanation of assertion.
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