Classification of Elements and Periodicity

What is the value of electron gain enthalpy of Na+ if IE₁ of Na =5.1 eV ?

Which one of the elements has the highest ionisation energy?

The electronic configuration of four elements are given below. Which elements does not belong to the same family as others ?

Which pair of atomic numbers represents s-block elements?

The first ionization potentials (eV) of Be and B respectively are

When a neutral atom is converted into a cation, there is

Be resembles much with

The stability of +1 oxidation state increases in the sequence:

The smallest among the following ion is

One of the characteristic properties of non-metals is that they

Which of the following pairs show reverse properties on moving along a period from left to right and from top to down in a group?

Correct order of first IP among following elements Be, B, C, N, O is

Chemical properties of lithium and magnesium are similar because

The correct order of ionisation energy for comparing carbon, nitrogen and oxygen is

Identify the correct order of the size of the following elements: Ca, K, Ar,Cl,S

Which one of the following elements has the maximum electron affinity?

Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is :

Which one of the following oxides is expected to exhibit paramagnetic behaviour?

The elements having the electronic configuration [Kr] 4d¹°f¹⁴,5s² p⁶d²,6s² belongs to

For electron affinity of halogens, which of the following is correct?

Among K, Ca,Fe and Zn the element which can form more than one binary compound with chlorine is

An atom has electronic configuration 1s²2s²2p⁶3s²3p⁶3d³4s², you will place it in which group?

If the atomic number of an element is 33, it will be placed in the periodic table in the

In the periodic table from left to right in a period,the atomic volume

Elements of which of the following groups will form anions most readily ?

One would expect proton to have very large

Which electronic configuration of an element has abnormally high difference between second and third ionization energy ?

Which one of the following is the correct order of size of the iodine species?

In the periodic table going down in fluorine group

Which of the following order of element is wrong?

Which one of the following ions will be the smallest in size?

Which of the following sets has strongest tendency to form anions ?

Which of the following is the smallest in size?

Na⁺, Mg²⁺, Al³⁺ and Si⁴⁺ are isoelectronic. The order of their ionic size is

Among the elements with following electronic configurations, which one of them may have the highest ionization energy?

Which one of the following ionic species has the greatest proton affinity to form stable compound?

Which of the following does not represent the correct order of the properties indicated

The ionisation energy of nitrogen is more than that of oxygen because

The element, with atomic number 118, will be

Which of the following has the highest electron affinity?

Pauling’s electro negativity values for elements are useful in predicting

When the first ionisation energies are plotted against atomic number, the peaks are occupied

The correct order of the decreasing ionic radii among the following isoelectronic species are :

Electronic configuration of chalcogens in their outermost orbit is

The electronegativity of the following elements increases in the order

Variable valency in general, is exhibited by

The electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p³ What is the atomic number of the element, which is just below the above element in the periodic table?

Of the given electronic configurations for the elements, which electronic configuration indicates that there will be abnormally high difference in the second and third ionization energy for the element?

Identify the wrong statement in the following about elements

Which of the following statements about elements is true?

Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O?

In which of the following crystals of ionic compounds would you expect maximum distance between the centrres of cations and anions?

In the periodic table, with the increase in atomic number, the metallic character of an element

Ionic radii are

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

Based on lattice energy and other considerations, which one of the following alkali metal chlorides is expected to have the highest melting point?

Point out the wrong statement. On moving horizontally from left to right across a period in the periodic table