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Lanthanoids and actinoids are placed in...

Lanthanoids and actinoids are placed in separate rows at the bottom of the periodic table, Explain the reason for this arrangement.

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These have been placed separately at the bottom of the periodic table for convenience . If they are placed within the body of the periodic table in serial order to increasing atomic number the periodic table will become extremely long and cumbersome.
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Why are lanthanides and actinides place at the bottom of the periodic table?

In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The electronic configuration of the element which is just above the element with atomic number 43 in the same group is

In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The last element of the p-block in 6th period is represented by the outermost electronic configuration

Actinoids and lanthanoids are placed respectively in ____________ of the periodic table.

All the lanthanoids and actinoids belong to period of

In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table Which of the element whose atomic numbers are given below, cannot be accommodated in the present set up of the long form of the periodic table ?

In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The element with atomic number 57 belongs to

In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The elements with atomic numbers 35,53 and 85 are all

PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -Additional Question (very short answer question )
  1. What is the IUPAC name official name and symbol of the element ...

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  2. What are super heavy elements?

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  3. What are the atomic number of the elements which constitute f- b...

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  4. Lanthanoids and actinoids are placed in separate rows at the botto...

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  5. Why Ar (argon) (at, wt. = 39.94) has been placed before K (at. Wt. = 3...

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  6. In terms of electronic configuration, what the elements of a given per...

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  7. Name the groups of elements classified as s- ,p - and d- blocks.

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  8. To Which block (s,p , d or f ) does the element with atomic numbe...

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  9. Which among the following is a transition element?

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  10. Which has a larger radius : (i) Mg or Ca (ii) S or Si

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  11. Compare the size of (a) Na atom with Na^(+) ion (b) Cl atom with C...

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  12. Give four examples of species which are isoelectronic with Ca^(2+...

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  13. Arrange the following ions in order of decreasing ionic radii : ...

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  14. A1 atom loses electrons successively to form A1^(+) ,A1^(2+) and A...

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  15. Which one among the following elements has the lowest first ion...

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  16. Name the element in the table which has the highest and lowest ...

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  17. From amongst Be, B and C, Choose the element with highest and lowe...

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  18. Why is first ionization enthalpy of nigtrogen greater than that ...

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  19. Why are electron gain enthalpies of Be and Mg positive ?

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  20. Which of the following elements has most positive electron gain ...

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