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Standard IX

Chemistry

Layout of Modern Periodic Table

Which of the ...

Question

Which of the following property progressively increases down a group in the modern periodic table?

Electronegativity

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Electron affinity

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Ionization potential

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Size of the atom

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Solution

The correct option is D
Size of the atom

As we go down the group in the modern periodic table, the ionization potential, electronegativity and electron affinity all progressively decreases. However, the atomic size progressively increases as we go down the group due to the increase in number of shells.

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Similar questions

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.

(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. Fill in the blanks from the choices given below:
(i) Across a period, the ionisation potential __________ (increases, decreases, remains same).
(ii) Down the group, electron affinity _________ (increases, decreases, remains same).

Q. State, whether the following statements are true or false:
(i) Fluorine has higher electron affinity than chlorine.
(ii) Similar electronic configuration is repeated after intervals of 2, 8, 8, 18 and 32.
(iii) Al₂O₃ is an amphoteric oxide.
(iv) On moving horizontally across a period, number of valency electrons increases from one to eight.
(v) All members of zero group are non-metals.
(vi) The elements with higher electron affinity have higher ionization potential.

Q. Arrange the following in increasing order of property indicated:
(i) Li, Be and B (ionization energy)
(ii) F, Cl, Br, I (electron affinity)
(iii) SiO₂, P₂O₅, SO₃, Cl₂O₇ (acidic nature)
(iv) I, I⁺, I⁻ (atomic size)

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