X and Y are two univalent elements. In order to form electrovalent compounds XY and YX, what would be their values of ionisation potentials, electron gain enthalpy and electro-negativity? 

Consider the elements N, P, O and S and arrange them in order of : (b) Increasing negative electron gain enthalpy

The Chemical bond fonned due to electron transfer is called ionic bond or electro valent bond Ionic bond will be formed more easily between the elements with low ionisation potential and high electron affinity. Energy changes involved during the fonnation of ionic compound can be calculated by Born - Haber cycle. Lattice enthalpy changes are directly proportional to the stability of ionic compound. Which or the following has electrovalent bond ?

The chemical bond fonned due to electron trdllsfer is called ionic bond or electro valcnt bond, Ionic bond will be formed more easily between the elements with low ionization potential and high electron affinity. Energy changes involved during the fonnatioo of ionic compound can be calculated by Born-Haber cycle. Lattic enthalpy changes are directly proportional to the stability of ionic compound Most stable ionic compound among the following is

The chemical bond fonned due to electron trdllsfer is called ionic bond or electro valcnt bond, Ionic bond will be formed more easily between the elements with low ionization potential and high electron affinity. Energy changes involved during the fonnatioo of ionic compound can be calculated by Born-Haber cycle. Lattic enthalpy changes are directly proportional to the stability of ionic compound Boron-Haber cycle is based on

The amount of energy released when an electron is added to an isolated gaseous atom to produce a monovalent anion is called electron affinity or first electron affinity or electron gain enthalpy. The first electron is given a negative sign as the addition of an electron to a neutral atom is an exoergic process. The addition of electron to A^(-1) requires energy to overcome the force of repulsion. Thus, the second electron affinity is an endoergic process. The magnitude of electron affinity depends on a number of factors such as (i) atomic size (ii) effective nuclear charge (iii) screening effect (iv) half and fully filled orbitals and (v) shape of orbital. In general, electron affinity increases as the atomic radii decrease in a period. However, there are exceptions when the atoms have stable configurations. In a group, electron affinity decreases as the size increases. However, the members of 3rd period have somewhat higher values than the members in the 2nd period of the same subgroups. Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?

The elements 'X', 'Y' and 'Z' form oxides which are acidic, basic and amphoteric respectively. The correct order of their electro negativity is

The minimum amount of energy required to remove the most loosely bound electron from an isolated atom in the gaseous state in known as ionisation energy or ionisation enthalpy (IE_1) of the element. The energy required to remove the second electron from the monovalent cation is called second ionisation enthalpy (IE_2) . Similarly, we have third, fourth ..... inonisation enthalpies. The values of ionisation energy depends on a number of factors such as (i) size of the atom (ii) screening effect (iii) nuclear charge (iv) half filled and fully filled orbitals (v) shape of orbital. In a group, the ionisation energy decreases from top to bottom. In a period, the value of ionisation energy increases from left to right. The first ionisation energy of Mg, Al, P and S follows the order: