Classification ...

Which of the following is not a Dobereiner triad -

Which of the following set of elements obeyes Newland’s octave rule -

Which of the following will not form crystalline structure with oppositely charged ions

Which is not anomalous pair of elements in the Medeleeves periodic table -

Elements in the same vertical group of the periodic table have same

The places that were left empty by Mendeleev were, for -

Which of the following pairs of elements do not follow octave rule -

Elements which occupied position in the lother meyer curve, on the peaks, were -

Modern periodic table is based on atomic no. experiments which proved importance of at no. was -

Atomic no. is the base of -
(i) Lother meyer curve
(ii) Newland octave rule
(iii) Modern periodic table
(iv) Doeberiener triad rule
(v) Long form of periodic table

Atomic wt. or Cl = 35.5 and of I = 127. According to doeberiner triad rule, At. wt. of Br will be -

The elements of groups, 1, 2, 13, 14, 15, 16 and 17 are collectively called -

Justification of putting H in VII A group is -

The discovery of which of the following group of elements gave a death blow to the Newlands Law -

Which of the following pair of elements follows Newland’s octave rule -

(IIIB) changes to  by emission of α-particle. Daughter element will be in -

From the list given below, elements which belongs to the same group or sub-group are -

The name ‘Rare earths’ is used for -

Z/e ratio for N^3-, O^2- and F^- respectively will be -

There are 10 neutrons in the nucleus of the element _zM¹⁹. It belongs to -

Which of the following is not an actinoid?

the electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p³. the atomic number of the element which is just below the above element in the periodic table is ________

The number of elements in 5th and 6th period of periodic table are respectively -

Atomic number of Ag is 47. In the same group the atomic number of elements placed above and below Ag will be -

Atomic number 15, 33, 51 represents the following family -

The atom having the valence shell electronic configuration 4s² 4p² would be in -

The number of elements know at that time when Mendeleev arranged them in the periodic table was-

As applied to periodic table, which of the following sets include only magic numbers -

In the general electronic configuration -

(n - 2)f^1-14 (n - 1)d^0-1 ns², if value of n = 7 the configuration will be -

The correct order of atomic size of C, N, P, S follows the order -