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प्रश्न
In the modern periodic table, elements are arranged in order of increasing atomic numbers which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, 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 Arfbau principle, the seven periods 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 elements whose atomic numbers are given below, cannot be accommodated in the present set-up of the long form of the periodic table?
पर्याय
107
118
126
102
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उत्तर
126
Explanation:
Presently there are 7 periods and 18 groups in the long form of periodic table and it can acquire only 118 elements.
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संबंधित प्रश्न
Write the general outer electronic configuration of f- block elements.
Which of the following lanthanoid ions is diamagnetic?
Which of the following oxidation states is most common among the lanthanoids?
Assertion: Ce4+ is used as an oxidizing agent in volumetric analysis.
Reason: Ce4+ has the tendency of attaining +3 oxidation state.
The actinoid elements which show the highest oxidation state of +7 are ____________.
Justify the position of lanthanides and actinides in the periodic table.
What are actinoids? Give three examples.
Compare lanthanoids and actinoids.
Out of Lu(OH)3 and La(OH)3 which is more basic and why?
Why do zirconium and Hafnium exhibit similar properties?
The elements in which electrons are progressively filled in 4f-orbital are called ______.
In the modern periodic table, elements are arranged in order of increasing atomic numbers which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, 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 Arfbau principle, the seven periods 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 electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, 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 Arfbau principle, the seven periods 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 ______.
Electronic configurations of four elements A, B, C and D are given below:
(A) 1s22s22p6
(B) 1s22s22p4
(C) 1s22s22p63s1
(D) 1s22s22p5
Which of the following is the correct order of increasing tendency to gain electron:
Illustrate by taking examples of transition elements and non-transition elements that oxidation states of elements are largely based on electronic configuration.
Electronic configuration, [Ne] 3s2 3p4 is for ______.
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Size of Bk3+ ion is less than Np3+ ion.
Reason R: The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below.
