Question

$\huge \mathfrak {\pink {\underline {\underline{qusetion : - }}}}$
1] Define typical transitional elements. which of the following is a typical transitional element?

(a) Cu (b) Ag (c) Au (d) All

2] O²⁻ and Si⁴⁺ are isoelectronic species . If the ionic radius of O²⁻ is 1A⁰, the ionic radius of Si⁴⁺ will be

(a) 1.4A⁰ (b) 0.41A⁰ (c)2.8A⁰ (d)1.5A⁰

NEED WITH EXPLANATION



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Answer 1

Answer:

1) Most transition elements have high melting points and densities, so chromium is a typical transition element. The group 1 elements have low melting points and densities, so sodium is a typical group 1 element.

Cu Ag Au are typical transitional element.

2) 0.41A⁰ the ionic radius of Si⁴⁺ .

Explanation:

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Answer 2

Answer:

1) an element having a subshell that is partially filled with electrons, or an element that has the ability to form stable cations with an incompletely filled orbital.

The correct option is - (d) All because Cu,Ag,Au all the elements belongs to d- block elements and shows more than one oxidation states , hence all the three elements are transition elements.

2) 0.41A⁰ the ionic radius of Si⁴⁺ .

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