Question

Plz answer me 2nd , 3rd, 4rth and 5th questions. I'll mark your answer as brainliest answer. Plz guys

Answer 1

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Question 2:

Among the following, trends of ionic radii are correct is:

(a) F⁻ > Na⁺ > Mg²⁺

(b) Al³⁺ > O²⁻ > N³⁻

(c) P³⁻ > Al³⁺ < Cl⁻

(d) H⁻ > H⁺ > He⁺

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Answer and Explanation

Your answer is option (a)

This is because, negative charge over an atom increases the size of the atom and positive charge over the atom decreases the size of the atom due to more effective nuclear charge

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Question 3

Atomic radii of fluorine and neon in Angstrom units are respectively given by:

(a) 0.72, 1.60

(b) 1.60, 1.60

(c) 0.72, 0.72

(d) both (b) and (c)

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Answer and explanation:

Your answer is option (a) because, size of fluorine atom is smaller than size of neon atom

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Question 4

Which one has the smallest atomic size?

(a) N³⁻

(b) O²⁻

(c) F⁻

(d) Na⁺

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Answer and explaination:

Your answer is option (d), because, More is the positive charge, less is the atomic size

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Question 5

Answer and explanation

Assertion is correct but reason is wrong

This is because, more the atomic number, more will be the charge, and due to more charge, the atomic radius decreases and it does  not increase

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