The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is:
  • Both are found together in nature
  • Both have nearly the same size
  • Both have similar electronic configuration
  • The ratio of their charge and size (i. e. charge density) is nearly the same
The element with atomic number 35 belongs to
  • d – Block
  • f – Block
  • p – Block
  • s – Block
The correct order of first ionization potential among following elements, Be, B, C, N and O is
  • B < Be < C < O < N
  • B < Be < C < N < O
  • Be < B < C < N < O
  • Be < B < C < O < N
Representative elements are those which belong to
  • p and d – Block
  • s and d – Block
  • s and p – Block
  • s and f – Block
Which of the following properties generally decreases along a period?
  • Ionization Energy
  • Metallic Character
  • Electron Affinity
  • Valency.
On the Paulings electronegativity scale the element next to F is
  • N
  • Cl
  • O
  • Ne.
The group number, number of valence electrons, and valency of an element with the atomic number 15, respectively, are:
  • 16, 5 and 2
  • 15, 5 and 3
  • 16, 6 and 3
  • 15, 6 and 2
Which of the following oxides is amphoteric in character?
  • SnO
  • CO
  • SiO
  • CaO
In the modern periodic table, the period indicates the value of:
  • Atomic Number
  • Atomic Mass
  • Principal Quantum Number
  • Azimuthal Quantum Number
In the long form of the periodic table, the valence shell electronic configuration of 5s²5p
  • Group 16 and period 6
  • Group 17 and period 6
  • Group 16 and period 5
  • Group 17 and period 5
Arrange S, O and Se in ascending order of electron affinity
  • Se < S < O
  • Se < O < S
  • S < O < Se
  • S < Se < O
In the modern periodic table , the period indicates the value of:
  • Atomic Number
  • Atomic Mass
  • Principal Quantum Number
  • Azimuthal Quantum Number
The electronic configuration of an element is 1s², 2s² 2p, 3s² 3p³. What is the atomic number of the element which is just below the above element in the periodic table
  • 31
  • 34
  • 33
  • 49
The reduction in atomic size with increase in atomic number is a characteristic of elements of-
  • d−block
  • f−block
  • Radioactive series
  • High atomic masses
The number of elements in the 5th period of the periodic table is
  • 3
  • 9
  • 8
  • 18
Which of the following forms the most stable gaseous negative ion?
  • F
  • Cl
  • Br
  • I
On the Paulings electro negativity scale the element next to F is
  • N
  • Cl
  • O
  • Ne.
The element californium belongs to a family of :
  • Alkali metal family
  • Actinide series
  • Alkaline earth family
  • Lanthanide series
Increasing order of electro negativity is
  • Bi < P < S < Cl
  • P < Bi < S < Cl
  • S < Bi < P < Cl
  • Cl < S < Bi < P
The electronic configuration of halogen is
  • ns² np
  • ns²
  • (i) and (ii)
  • None of the above
0 h : 0 m : 1 s

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