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Chemical Reactivity

Which of the ...

Question

Which of the following statements is incorrect about the trends in periodic properties in the periodic table ?

A

Metallic character increases from Li to Cs

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B

The acidity of oxides increases from left to right in a period

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C

Noble gases have the highest electron affinity among all the elements in the periodic table

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D

Ionisation energy of aluminium is lower than that of magnesium

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Solution

The correct option is C Noble gases have the highest electron affinity among all the elements in the periodic table
Electron affinity of noble gases is zero as these are highly inert gases because of their completely filled shells they have no tendency to gain or lose electrons.

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Similar questions

Q. The statement that is true for the long form of the periodic table is -
(A) It reflects the sequence of filling the electrons in the order of sub-energy level s, p, d and f.
(B) Electron affinity increases from left to right in a period.
(C) It reflects trends in physical and chemical properties of the elements.
(D) Non-metallic character decreases down the group.
Choose the correct statement :-

Q. Which of the following statements is not a correct statements about the trends when going from left to right across the periods of the periodic table?

(a) The elements become less metallic in nature.
(b) The number of valence electrons increases.
(c) The atoms lose their electrons more easily.
(d) The oxides become more acidic.

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.

Q. Question 1
Which of the following statements is not a correct statement about the trends when going from left to right across the periods of the periodic table?

1. The elements become less metallic in nature.
2. The number of valence electrons increases.
3. The atoms lose their electrons more easily.
4. The oxides become more acidic.

Q. Assertion :Metallic character increases from left to right in a period. Reason: The higher the value of ionization energy, electronegativity and electron affinity the more is the metallic character of the element.

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