Give a reason for each of the following:(i) Ionic compounds have a hig

1.	Give a reason for each of the following:(i) Ionic compounds have a high melting point. (ii) Inert gases do not form ions.(iii) Ionisation potential increases across a period, from left to right.
Answer» (i) Ionic compounds have ions held strongly by electrostatic forces of attraction. These strong forces need more energy to be broken apart. Hence, they have high melting point. (ii) Inert gases do not form ions because they have completely filled octet. They are extremely stable. Hence, they neither loose, nor gain electrons. (iii) As we move from left to right along a period, the atomic size decreases due to the increase in nuclear charge thus more energy is required to remove the electron, hence ionisation potential increase.

Give a reason for each of the following:(i) Ionic compounds have a high melting point. (ii) Inert gases do not form ions.(iii) Ionisation potential increases across a period, from left to right.

Answer»

(i) Ionic compounds have ions held strongly by electrostatic forces of attraction. These strong forces need more energy to be broken apart. Hence, they have high melting point.

(ii) Inert gases do not form ions because they have completely filled octet. They are extremely stable. Hence, they neither loose, nor gain electrons.

(iii) As we move from left to right along a period, the atomic size decreases due to the increase in nuclear charge thus more energy is required to remove the electron, hence ionisation potential increase.

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