Lothar Meyer arranged the elements in order of increasing:
  • Atomic weight
  • Density
  • Atomic volume
  • Atomic radii
Law of Octaves was proposed by:
  • JW Dobereiner
  • D.I Mendeleev
  • John Alexander Newlands
  • Lothar Meyer
Law of Triads is applicable to which set of elements?
  • Sodium, Potassium, Rubidium
  • Fluorine, Iodine, Bromine
  • Chlorine, Bromine, Iodine
  • Lithium, Beryllium, Boron
In Mendeleev's periodic table, the groups were divided into how many subgroups?
  • 4
  • 1
  • 2
  • 3
Modern periodic table is divided into:
  • 18 periods and 7 groups
  • 8 periods and 18 groups
  • 18 periods and 8 groups
  • 7 periods and 18 groups
Moseley performed experiments and studied the frequencies of which radiations emitted from the elements?
  • Gamma rays
  • X-rays
  • UV rays
  • Infra red rays
Among the following statements the one that is not true about Mendeleev's Periodic Table is:
  • Elements of group 7 and 8 were arranged on the basis of equivalent weights
  • Some elements in the same group differ in their properties
  • Elements were arranged on the basis of atomic weights
  • The position of hydrogen was not justified
Which scientist proposed that atomic number is more fundamental property of an element than its atomic mass?
  • Newlands
  • Lothar Meyer
  • Moseley
  • Meyer
Johann Dobereiner classified elements in group of three elements called as
  • Trinity
  • Trials
  • Triads
  • Diads
In the modern periodic table, which period contains 32 elements?
  • Sixth
  • First
  • Seventh
  • Second
Horizontal rows in the periodic table are called:
  • Cell
  • Table
  • Groups
  • Periods
The second and third period of the modern periodic table contains how many elements?
  • 8
  • 32
  • 18
  • 2
Newland arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to:
  • Third element
  • Fourth element
  • Second element
  • First element
According to Dobereiner's law of triads the number of elements present in each group is:
  • 2
  • 4
  • 5
  • 3
Lothar Meyer proposed that on arranging the elements in order of increasing atomic weights; similarities appear in which type of properties?
  • Only physical properties
  • Only chemical properties
  • In both physical and chemical properties
  • thermodynamic properties
Eka silicon predicted by Mendeleev is which element:
  • Germanium
  • Aluminium
  • Gallium
  • Sodium
Eka aluminium predicted by Mendeleev is which element?
  • Germanium
  • Magnesium
  • Gallium
  • Sodium
The basis of long form of periodic table is:
  • Mass number
  • Atomic weight
  • Atomic number
  • Ionic radius
Mendeleev predicted the existence of which element/elements in the periodic table?
  • Gallium
  • Sodium and germanium
  • Gallium and germanium
  • Germanium and Gold
At present how many elements are known?
  • 110
  • 114
  • 63
  • 105
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