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Properties Determining Metallic and Non-metallic Character

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.

(b) The electronegativity:

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Solution

Correct answer : (d) increases

Across the period, atomic size decreases, and nuclear charge increases.

The tendency to attract shared pairs of electrons increases. Hence, electronegativity increases on moving from left to right in a period.

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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.

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.

(c) The ionization potential :

(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. 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

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. 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.
(c) The ionization potential:

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Properties Determining Metallic and Non-metallic Character

Standard X Chemistry

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