El ion Ti^2+ es isoelectrónico con el átomo de Ca. (a) ¿Hay...

El ion $\mathrm{Ti}^{2+}$ es isoelectrónico con el átomo de Ca. (a) ¿Hay diferencias en las configuraciones electrónicas del $\mathrm{Ti}^{2+}$ y del Ca? (b) Con referencia a la figura 6.22 , comente los cambios en el ordenamiento de las subcapas $4 s$ y $3 d$ en $\mathrm{el}$ Ca y el $\mathrm{Ti}^{2+}$. (c) ¿El Ca y el Ti ${ }^{2+}$ tienen el mismo número de electrones no apareados? Explique.

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Key Concepts

Isoelectronic Species

This concept refers to different atoms or ions that have the same number of electrons. Despite having identical electron counts, differences in nuclear charge may lead to variations in other properties, such as orbital energy ordering and electron pairing.

Electronic Configuration

Electronic configuration describes the distribution of electrons among an atom’s or ion’s orbitals. It is fundamental for understanding chemical behavior, as it determines how electrons fill various energy levels and subshells, impacting reactivity and magnetism.

Orbital Energy Ordering

Orbital energy ordering refers to the relative energies of atomic orbitals, which can vary between neutral atoms and ions. For example, the energy levels of the 4s and 3d orbitals can shift upon ionization, leading to differences in their filling sequence and overall electronic arrangement.

Subshell Filling and Electron Pairing

This concept involves the rules governing the occupation of electrons in atomic subshells, including the Pauli exclusion principle and Hund’s rule. The number of unpaired electrons in a system plays a critical role in determining magnetic properties and is influenced by how electrons are arranged within the available orbitals.

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