Identify two ions that have the following ground-state electron configurations: (c) [Kr]5s²4d¹⁰

Electron configuration describes the distribution of electrons in an atom's orbitals. It is represented using a notation that indicates the energy levels and sublevels occupied by electrons. For example, the notation [Kr]5s²4d¹⁰ indicates that the atom has a core configuration similar to krypton, with additional electrons in the 5s and 4d orbitals.

Ionic charge refers to the electrical charge that an atom or molecule acquires when it loses or gains electrons. Cations are positively charged ions formed by losing electrons, while anions are negatively charged ions formed by gaining electrons. Understanding the ionic charge is essential for identifying ions based on their electron configurations.

Transition metals are elements found in the d-block of the periodic table, characterized by their ability to form variable oxidation states and colored compounds. They typically have partially filled d orbitals, which play a crucial role in their chemical behavior. The electron configuration [Kr]5s²4d¹⁰ suggests that the ions in question may be derived from transition metals, which often exhibit complex electron arrangements.