{:(" a) ""Newland law of octaves"," P) "...

`{:(" a) ""Newland law of octaves"," P) ""Atomic mass Vs atomic volume"),(" b) ""Mendeleev"," Q) ""Li, Na, K"),(" c) ""Electronic configuration"," R) ""One to seven groups sub-divided into group A and B"),(" d) ""Lother Meyer"," S) ""Periodic repetition of properties of elements"),(" e) ""Dobereiner's tried"," T) ""Only 56 elements known"):}`

`a - T , b - S , c - R , d - P , e - Q `

`a - T , b - R , c - S , d - P , e - Q `

`a - T , b - R , c - s , d - Q , e - P `

` a - R , b - T , c - S ,d - P , e - Q `

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Which one is not a salient features of the Mendeleeff's periodic table. a) Groups and Sub-groups. b) Predicting the properties of missing elements. c) Anomalous series. d) Correction of atomic weights.

{:("Column - I (Name of element)","Column - II (Group of element)"),(" a) ""Nitrogen",P . 15),(" b)""Aluminium",Q . 16),(" c) ""Chlorine",R . 17),(" d) ""Oxygen",S . 13),(" e) ""Copper",T . 11):}

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. Elements A, B, C, D and E have the following electronic configuration: (A) 1s^2, 2s^2 2p^1 (B) 1s^2, 2s^2 2p^6 , 3s^2 3p^1 (C ) 1s^2, 2s^2 2p^6 , 3s^2 3p^3 (D) 1s^2 , 2s^2 2p^6 , 3s^2 3p^5 (E) 1s^2 , 2s^2 2p^6 , 3s^2 3p^6 Which among these will belong to same group in the periodic table ?

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. What is the position of the element in the periodic table satisfying the electronic configuration (n-1)d^1 ns^2 for n=4 ?

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. An element belongs to group 17 with atomic number is 17. What is the atomic number of the element belonging to same group and present in fifth period?

Which of the following statements about the modern periodic table are incorrect ? (a) The elements in Modern periodic table are arranged on the basis of their decreasing atomic number. (b) The elements in Modern periodic table are arranged on the basis of their increasing atomic masses. (c) Isotopes are placed in adjoining groups in the periodic table. (d) The elements in the modern periodic table are arranged on the basis of their increasing atomic number.

{:("Column-I","Column-II"),((A) NO_(3)^(-),(P)"Numerical value of oxidation number of central ato.m is equal to its covalency in the given species "),((B) CO_(3)^(2-), (Q) "Negative charge on central atom "),((C) ICI_(4)^(-),(R)"Maximum possible oxidation number of central atom "),((D) SO_(3)^(2),(S)"Minimum possible oxidation number of surrounding atom "),("",(T) "One co-ordinate covalent bond is present"):}

Given below is the electronic configuration of elements A,B,C,D: (A) 1s^2 2s^2, (B) 1s^2 2s^2 2p^6 3s^2, (C) 1s^2 2s^2 2p^6 3s^2 3p^3, (D) 1s^2 2s^2 2p^6 , To which group and period does the element 'C' belong?

VGS PUBLICATION-BRILLIANT-ACIDS,BASES AND SALTS-4. Classification of Elements - The periodic Table

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{:("Column - I (Name of element)","Column - II (Group of element)"),("...
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An atom of an element (X) has its K , L and M shell filled with som...
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{:(" a) ""Newland law of octaves"," P) ""Atomic mass Vs atomic volume"...
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Look at the group - I of the modern periodic table as given below . ...
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