Classification ...

Ionization enthalpy increases across a period because

One of the following has ns¹ as its outermost electronic configuration

The correct increasing order of radii of following species is  ----?

Amongst the following elements (whose electronic configurations are given below), the one having the highest ionization enthalpy is

To which block of elements in the periodic table 3d¹⁰4s² belongs?

The ionisation enthalpy of lithium is 520 kJ/mol. How much enthalpy is needed to convert all atoms of Li to Li⁺ ions present in 7 mg of Li vapours?

In the periodic table Electronegativity generally

Which of the following is a set of isoelectronic species (At. No. of Cs = 55, Br = 35)?

The elements with atomic numbers 9, 17, 35, 53 and 85 are all

Identify the correct order in which the ionic radii of the following ions increase:

I. F^-
II. Na⁺
III. N^3-

The correct order of decreasing electronegativity values among the elements I - beryllium, II - oxygen, III - nitrogen and IV - magnesium is

Consider the ions K⁺, S^2-, Cl^- and Ca²⁺. The radii of these ionic species follow which of the following orders?

The correct order of increasing radii of the elements Na, Rb, K and Mg is

The correct order of increasing radii of the elements Na, Si, Al and P is

The polarizing power of the anions N^3-, O^2- and F^-, follows the order

Which of the following orders is not correct according to the property written against it?

The ionization enthalpy of nitrogen is more than that of oxygen because of

Which of the following statements is/are correct?

Which of the following isoelectronic ions has the lowest ionization energy?

The correct order for the increase in atomic radii is

The correct order for the decrease in atomic radii is

Choose one of the following in the increasing order of electron gain enthalpy

The formation of oxide ion O^2- (g) requires first an exothermic and then an endothermic step as shown below:

O (g) + e^-  O^- (g)     H_o = - 142 kJ/mol
O^- + e^-  O^2- (g)    H_o = + 844 kJ/mol

This is because

Right order of increasing metallic character is:

In which of the following pairs is the first atom or ion not larger than the second?

Which of the following electronic configurations corresponds to the element with the largest negative electron gain enthalpy?

One of the following options is not used for explaining atomic radius

For P^3-, S^2- and Cl^- ions, the increasing order of size is

Directions: The following question has four choices out of which ONLY ONE is correct.

Which of the following processes requires the highest energy?