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Standard X

Chemistry

Trends in Ionization Energy

Part a to e r...

Question

Part (a) to (e) 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 correct answer.
(e) The electrons affinity of the elements in groups 1 to 7:

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Solution

Correct answer : (c) increases

The electron affinity of the elements in groups 1 to 7 increases because the attraction force between the nucleus and outer electrons increases.

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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.

Q. Choose the correct answer:
With reference to the variation of properties in the Periodic Table, which of the following is generally true?
(a) Atomic size increases from left to right across a period.
(b) Ionisation potential increases from left to right across a period.
(c) Electron affinity increases going down a group.
(d) Electronegativity increases going down a group.

Fill in the blanks in the following statements :

(a) The horizontal rows in a periodic table are called .............

(b) In going across a period (right to left) in the periodic table, the atomic size of the atom .............

(d) When we down in a group in the periodic table, the metallic character of elements ..............

(e) The tendency to gain an electron ................ on moving down in a group of the periodic table.

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 electron affinity of the elements in groups 1 to 7 :

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Trends in Ionization Energy

Standard X Chemistry

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Part (a) to (e) 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 correct answer. (e) The electrons affinity of the elements in groups 1 to 7:

Correct answer : (c) increases The electron affinity of the elements in groups 1 to 7 increases because the attraction force between the nucleus and outer electrons increases.

Part (a) to (e) 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 correct answer.
(e) The electrons affinity of the elements in groups 1 to 7:

Correct answer : (c) increases

The electron affinity of the elements in groups 1 to 7 increases because the attraction force between the nucleus and outer electrons increases.