What are the trends in electron configuration across the periodic table?
The trends in electron configuration include the filling order of orbitals, which follows the Aufbau principle, and how electron configurations change across periods and groups.
Can you explain the Aufbau principle?
Sure! The Aufbau principle states that electrons occupy the lowest energy orbitals first before moving to higher energy levels.
How does electron configuration affect chemical properties?
Electron configuration determines how atoms interact with each other, influencing their reactivity, ionization energy, and electronegativity.
What are some exceptions to the typical electron configuration?
Exceptions occur in transition metals and lanthanides, where electrons may be promoted to higher energy orbitals for stability.
Can you give examples of these exceptions?
Certainly! For example, chromium (Cr) has an electron configuration of [Ar] 3d5 4s1 instead of [Ar] 3d4 4s2, and copper (Cu) is [Ar] 3d10 4s1 instead of [Ar] 3d9 4s2.
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