NEET Exam  >  NEET Questions  >  There are two rows of inner transition elemen... Start Learning for Free
There are two rows of inner transition elements in the periodic table each containing 1414 elements. The reason for this may be
  • a)
    F-orbital has seven values for magnetic quantum number, hence total electrons are 14
  • b)
    In the periodic table there is space to accommodate 14 electrons only
  • c)
    Only 28 inner transition elements have been discovered till date
  • d)
    28 is the maximum number of elements that any block can accommodate
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
There are two rows of inner transition elements in the periodic table ...
For f-orbital, l = 3, ml= 2l + 1 = 7
There are 7 electrons with +1/2 spin and 7 electrons with -1/2 spin. Hence, total electrons are 14.
View all questions of this test
Most Upvoted Answer
There are two rows of inner transition elements in the periodic table ...
Explanation:
The inner transition elements are also known as f-block elements, and they are located at the bottom of the periodic table. They consist of two rows, each containing 14 elements. This arrangement can be explained by the properties of the f-orbital and the magnetic quantum number.

1. F-orbital and Magnetic Quantum Number:
The f-orbital has a total of seven possible values for the magnetic quantum number (m), which ranges from -3 to +3. Each value of m can accommodate two electrons, as stated by Hund's rule. Therefore, the f-orbital can hold a maximum of 14 electrons (2 electrons for each of the seven values of m).

2. Arrangement of Inner Transition Elements:
The inner transition elements occupy the f-block of the periodic table, which is divided into two sections: the lanthanides and the actinides. Each section consists of 14 elements, corresponding to the 14 possible values of the magnetic quantum number.

3. Lanthanides:
The first row of inner transition elements is known as the lanthanides. It starts with the element lanthanum (atomic number 57) and ends with lutetium (atomic number 71). These elements fill the 4f subshell, which has seven possible values of the magnetic quantum number (m = -3 to +3). Therefore, the lanthanides contain 14 elements, filling the 4f subshell completely.

4. Actinides:
The second row of inner transition elements is called the actinides. It begins with the element actinium (atomic number 89) and ends with lawrencium (atomic number 103). These elements fill the 5f subshell, which also has seven possible values of the magnetic quantum number (m = -3 to +3). Hence, the actinides consist of 14 elements, completely filling the 5f subshell.

Conclusion:
The presence of two rows of inner transition elements, each containing 14 elements, can be explained by the f-orbital having seven values for the magnetic quantum number. Each value of m can accommodate two electrons, resulting in a maximum of 14 electrons for the f-orbital. This arrangement is observed in the lanthanides and actinides, which fill the 4f and 5f subshells, respectively.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Similar NEET Doubts

Read the passage given below and answer the following questions:The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table. As all the d block elements are metallic, the term d-block metals is synonymous. This set of d-block elements is also often identified as the transition metals, but sometimes the group 12 elements (zinc, cadmium, mercury) are excluded from the transition metals as the transition elements are defined as those with partly filled d or f shells in their compounds. Inclusion of the elements zinc, cadmium and mercury is necessary as some properties of the group 12 elements are appropriate logically to include with a discussion of transition metal chemistry. The term transition element or transition metal appeared to derive from early studies of periodicity such as the Mendeleev periodic table of the elements. His horizontal table of the elements was an attempt to group the elements together so that the chemistry of elements might be explained and predicted. In this table there are eight groups labeled I-VIII with each subdivided into A and B subgroups. Mendeleev recognized that certain properties of elements in Group VIII are related to those of some of the elements in Group VII and those at the start of the next row Group I. In that sense, these elements might be described as possessing properties transitional from one row of the table to the next.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

Top Courses for NEET

There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer?
Question Description
There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer?.
Solutions for There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice There are two rows of inner transition elements in the periodic table each containing1414elements. The reason for this may bea)F-orbital has seven values for magnetic quantum number, hence total electrons are 14b)In the periodic table there is space to accommodate 14 electrons onlyc)Only 28 inner transition elements have been discovered till dated)28 is the maximum number of elements that any block can accommodateCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev