The missing values of atomic radius of Ru , density of Os , and melting point of Fe belonging to Group VIII / 8 are to be stated. Concept introduction: The distance present between the nucleus and the valence shell electrons of an atom is known to be the atomic size or atomic radius of that atom. On moving along the period in a periodic table, the number of orbitals remains the same and a new electron is added to the same orbit. As a result, the atomic radius of elements decreases along the period. On the other hand, the atomic radius of elements increases down the group due to addition of extra orbital.

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Chapter 5, Problem 84E

Interpretation Introduction

Interpretation:

The missing values of atomic radius of Ru, density of Os, and melting point of Fe belonging to Group VIII/8 are to be stated.

Concept introduction:

The distance present between the nucleus and the valence shell electrons of an atom is known to be the atomic size or atomic radius of that atom. On moving along the period in a periodic table, the number of orbitals remains the same and a new electron is added to the same orbit. As a result, the atomic radius of elements decreases along the period. On the other hand, the atomic radius of elements increases down the group due to addition of extra orbital.

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