Question

The atomic radius of Zn in first transition series increases instead of decreasing.Explain by giving reasons.

Answer 1

Answer:

Explanation:

At the same time, in transition elements the number of electrons in the 3d sub-shell will increase. This will repel the already present 4s electrons. ... As you go down a group, new electron shells are occupied which extend further from the nucleus, increasing the atomic radius. Therefore option 1 must be wrong.

Answer 2

Answer:

The atomic radius of Zn is larger than expected because of the presence of the completely filled 3d subshell, results in weak effective nuclear charge.

Explanation:

Reasons behind the increased atomic radius of Zn:-

• 3d subshell has a stable electronic configuration and is highly shielded by the 3p and 4s electrons. As a result, the outermost 4s electron experiences a weaker effective nuclear charge and is therefore more loosely bound to the nucleus, leading to an increase in the atomic radius of Zn.

• Zn has a high ionization energy due to its filled 3d subshell, which makes it difficult to remove an electron from the atom. This also contributes to the increase in atomic radius.

• In addition, Zn forms a strong metallic bond due to the presence of a large number of delocalized electrons in its crystal lattice, which results in a significant increase in the effective atomic radius.

To learn more about effective nuclear charge, visit

https://brainly.in/question/14250848

https://brainly.in/question/23048070

#SPJ3