Classification of Elements and Periodicity in Properties questions

826 published questions with worked solutions.

• The correct sequence which shows decreasing order of the ionic radii of the elements is
  JEE Main · 2010 · Chemistry · Classification of Elements and Periodicity in Properties
• Which of the following ions has the largest radius?
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The atomic numbers of elements X, Y and Z are 19, 21 and 25 respectively. The number of electrons present in the M-shell of these...
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The number of d-electrons in Fe^ 2+ (Z=26) is not equal to the number of electrons in which one of the following?
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The atomic number of an element is 35 and its mass is 81. The number of electrons in its outermost shell is
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• How many unpaired electrons are present in Ni^ 2+ cation? (At. no. =28)
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The pair of ions having same electronic configuration is
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• Find the electronic configuration of the O^ 2- ion
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The heat energy required to ionise the following molecules is given as follows N_2(g) H_1 N_2^ + (g) , O_2(g) H_2 O_2^ + (g)...
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because:
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The alkaline earth metals have smaller size than those of corresponding alkali metals. This is due to
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The second ionisation enthalpy of the alkaline earth metals are smaller than that of corresponding group I metals. This is due to
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• Beryllium and aluminium exhibit many properties which are similar but the two elements differ in
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The diagonal relationship in Be and Al is due to [MHTCET 2022]
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The electronic configuration of an element is 1s^2 ,2s^2 ,2p^6 ,3s^2 ,3p^6 ,3d^ 10 ,4s^2 ,4p^3 . Its properties would be similar...
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• Ionic radii (in Å) of As^ 3+ , Sb^ 3+ and Bi^ 3+ follow the order
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• Which one of the following elements is most metallic?
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The order of electron affinity of B, C, N and O is
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• Electron affinity of sulphur is
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
• The element having electronic configuration [Xe] 4f^ 14 5d^ 10 6s^2 6p^5 is
  MHT CET · Chemistry · Classification of Elements and Periodicity in Properties

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