The formula for the oxide formed by Eka-aluminum is:

1. ${\mathrm{EO}}_4$

2. ${\mathrm{E}}_2{\mathrm{O}}_3$

3. ${\mathrm{E}}_3{\mathrm{O}}_2$

4. EO

The period and group number of the element with Z =114 are:

 The trend of atomic radius in a period and a group is :

An element with higher negative electron gain enthalpy in the given pair is-

(i) O or F  (ii) F or Cl

The basic difference between the  electron gain enthalpy (E_a) and electronegativity (E_N) is -

The statement that "the electronegativity of N on the Pauling scale is 3.0 in all the nitrogen compounds" is incorrect because -

1. Electronegativity of an element is a variable property.

2. Pauling scale is not used to measure electronegativity.

3. The electronegativity of N on the Pauling scale is 12.0

4. None of the above.

The general outer electronic configuration of s, p, d , and f-block elements respectively would be :

The formula of the stable binary compounds that would be formed by 
an element having atomic number 71 and fluorine:

The incorrect statement about ionization enthalpy is -

Match the element in Column I with that in Column II.