What is ionization enthaply , electronegativity …

The amount of energy required to remove the most loosely bound electron from outermost shell found in an isolated gaseous state to form a cation is called as ionization enthalpy. The tendancy of an element to attract the bond pair of an electrons of another atom is called as electronegativity Variation in ionisation enthalpy: 1)As we go down the group.,the ionisation enthalpy should be low because of high shielding effect. 2)As we move left to right in a period the ionisation enthalpy should be high due to high nuclear charge Variation in electronegativity : 1)As we go down the group the electronegativity decreases due to greater atomic size and less attractive force 2)as we moving left to right in a period the electronegativity increase due to smaller atomic size and more force of attraction

Ionization Enthalpy of elements is the amount of energy that an isolated gaseous atom requires to lose an electron in its ground state. Losing of electrons results in the formation of cations.