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The number of elements which can be acco...

The number of elements which can be accommodated in the present set-up of the long from of the periodic table is :

A

`117`

B

`118`

C

`119`

D

`120`

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The correct Answer is:
B
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Which of the elements 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, s, 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 period table, elements are arranged in order of increasing atomic number which is related to the electric configuration. Depending upon the type of orbitals receving the last electron, the elements in the periodic table have been diviced into four blocks viz s,p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period being with the filling of a new energy shell. In according with the Aufbua principle, 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 lanthanodis and actionoids are placed at the bottom of the main body of the periodic table. Which of the elements whose atomic numbers are given below, cannot be accommodated in the present set up of the long form of the pariodic table?

How many elements are accommodated in the fifth period of the long form of the periodic table ?

In the long or modern form of the periodic table, the element in the periodic table have been divided into four blocks, s-p-d -and f -. Each period begins with the filling of new energy shell. Two series of f -block elements are placed at the bottom of the periodic table. Which of the element whose atomic numbers are given below cannot be accommodated in the present set-up of the modern periodic table?

The period number in the long form of the periodic table is equal to

The period number in the long form of the periodic table is equal to

How many groups are present in the long form of the periodic table?

Number of periods present in the long form of periodic table

In third period of the long form of the periodic table that is from Na to Cl

AAKASH INSTITUTE ENGLISH-MOCK TEST 5-Example
  1. The correct order of ionic radii of the following species is

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  2. Ammong the following, the element having highest ionization enthalpy a...

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  3. Addition of an electron to a neutral gaseous atom alwayds leads to (i...

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  4. Predict correct statement.

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  5. In which of the following pairs, the ionisation energy of the first sp...

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  6. The number of elements which can be accommodated in the present set-up...

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  7. Correct order of ionisation enthalpy is

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  8. Which of the following is correct for electron gain enthalpy (with -ve...

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  9. An element with atomic number 113 has been discovered.It will belong t...

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  10. In the general electronic configuration (n-2)^f(1-14) (n-1)^d(0-1) ns^...

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  11. Which of the following is a metalloid?

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  12. The X-X bond length is 1.5 Å and Y-Y bond length is 1.48 Å.If electron...

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  13. The common valency shown by the elements of group 15 is/are

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  14. Out of the following elements,which one is the most reactive chemicall...

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  15. What is the covalency of Al in [AlCl(H2O)5]^(2+) ?

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  16. Which of the following oxides is most basic in nature?

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  17. Elements of which block generally show maximum variation in valency?

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  18. In modern periodic table,the basic character of oxides

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  19. Beryllium and aluminimum exhibit many properties which are similar ....

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  20. Which of the following is the Lewis structure of O2 molecule?

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