Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • There are 14 elements in the actinide series. Which of the following element does not belong to this series?Option: 1 Tm

There are 14 elements in the actinide series. Which of the following element does not belong to this series?

Option: 1

Tm


Option: 2

Fm


Option: 3

Np


Option: 4

U


Answers (1)

best_answer

Classification of Elements : f-block -

  • The elements placed in two separate rows at the bottom of the periodic table are f-block elements.

  • These elements have their last electron enters into the f-orbital.

  • The elements from cerium to lutetium having incomplete 4f-orbitals are known as lanthanoids.

  • The elements from thorium to lawrencium having incomplete 5f-orbitals are known as actinides. 

  • The general electronic configuration of f-block elements is (n-2)f1-14(n-1)d1-2ns2.

-

Tm element or Thulium is the element which does not belong to this actinide series. The electronic configuration of Thulium is [Xe] 4f136s2. Thus, this element belongs to lanthanide series.

Therefore, Option(1) is correct

Posted by

sudhir.kumar

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

Andhra launches free JEE, NEET coaching to over 1 lakh govt school students
anam-khan

JoSAA Counselling 2025 LIVE: BTech registration starts at josaa.nic.in for IIT, NIT, IIIT admissions
anam-khan

Kota: 17-year old student from UP preparing for JEE dies of electrocution in hostel

Latest Question