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Standard XII

Chemistry

Electron Gain Enthalpy

Refer to chan...

Question

Refer to changes in properties of elements on moving left to right across a period of the periodic table.For each property , choose the letter corresponding to the correct answer from A,B,C and D.
The electron affinity of the elements in groups 1 to 7 :

increases

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decreases

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goes up and down

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decreases and then increases

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Solution

The correct option is A increases
As we move from left to right, tendency of elements to accept electron and completes theri octet increases so electron affinity increases.

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Similar questions

Q. Refer to changes in properties of elements on moving left to right across a period of the periodic table. For each property, choose the letter corresponding to the correct answer from A, B, C, and D.
The electronegativity :

Q. Refer to changes in properties of elements on moving left to right across a period of the periodic table.For each property , choose the letter corresponding to the correct answer from A,B,C and D.
Atomic Size :

Q. Part (i) to (v) refer to changes in the properties of elements on moving from left to right across a period of the periodic table. For each property, choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d).
(i) The non-metallic character of the elements:
(a) decreases
(b) increases
(c) remains the same
(d) depends on the period

(ii) The electronegativity:
(a) depends on the number of valence electrons
(b) remains the same
(c) decreases
(d) increases

(iii) The ionisation potential:
(a) goes up and down
(b) decreases
(c) increases
(d) remains the same

(iv) The atomic size:
(a) decreases
(b) increases
(c) remains the same
(d) sometimes increases and sometimes decreases

(v) The electron affinity of the elements in groups 1 to 7:
(a) goes up and then down
(b) decreases and then increases
(c) increases
(d) decreases

Parts (a) to (e) refer to changes in the properties of elements on moving from left to right across a period of Periodic Table. For each property, choose the correct answer.

(a) The non-metallic character of the elements :

(i) decreases, (ii) increases,

(iii) remains the same, (iv) depends on the period

(b) The electronegativity :

(i) depends on the number of valence electrons,

(ii) remains the same,

(iii) decreases,

(iv) increases.

(i) goes up and down (ii) decreases

(iii) increases (iv) remains the same

(d) The atomic size :

(i) decreases,

(ii) increases,

(iii) remains the same ,

(iv) sometimes increases and sometimes decreases.

(e) The electron affinity of the elements in groups 1 to 7 :

(i) goes up and then down.

(ii) decreases and then increases,

(iii) increases,

(iv) decreases.

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Refer to changes in properties of elements on moving left to right across a period of the periodic table.For each property , choose the letter corresponding to the correct answer from A,B,C and D.The electron affinity of the elements in groups 1 to 7 :

The correct option is A increasesAs we move from left to right, tendency of elements to accept electron and completes theri octet increases so electron affinity increases.

Refer to changes in properties of elements on moving left to right across a period of the periodic table.For each property , choose the letter corresponding to the correct answer from A,B,C and D.
The electron affinity of the elements in groups 1 to 7 :

The correct option is A increases
As we move from left to right, tendency of elements to accept electron and completes theri octet increases so electron affinity increases.