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# Assign the Position of the Element Having Outer Electronic Configuration In the Periodic Table. F7 (N - 1)D1 Ns2 For N = 6 - CBSE (Science) Class 11 - Chemistry

ConceptElectronic Configurations of Elements and Their Periodic Table

#### Question

Assign the position of the element having an outer electronic configuration in the periodic table.

f7 (n - 1)d1 ns2 for n = 6

#### Solution 1

Since n = 6, the element is present in the 6th period. It is an f –block element as the last electron occupies the f–orbital. It belongs to group 3 of the periodic table since all f-block elements belong to group 3. Its electronic configuration is [Xe] 4f7 5d1 6s2. Thus, its atomic number is 54 + 7 + 2 + 1 = 64. Hence, the element is Gadolinium.

#### Solution 2

n = 6

Means the element belongs to 6th period. Last electron goes to the f-orbital, element is from f-block.
group = 3

The element is gadolinium (z = 64)

Complete electronic configuration =[Xe] 4 f7 5d1 6s2.

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#### APPEARS IN

NCERT Solution for Chemistry Textbook for Class 11 (2018 to Current)
Chapter 3: Classification of Elements and Periodicity in Properties
Q: 30.2 | Page no. 94

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Solution Assign the Position of the Element Having Outer Electronic Configuration In the Periodic Table. F7 (N - 1)D1 Ns2 For N = 6 Concept: Electronic Configurations of Elements and Their Periodic Table.
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