Question

multiple choice question
the ground state configuration of electrons in an atom is the arrangement with the
o smallest radius.
o greatest distance between electrons.
o most orbitals.
o lowest energy.

Explanation:

The ground - state electron configuration of an atom is the arrangement of electrons with the lowest possible energy. This is in accordance with the Aufbau principle, Pauli exclusion principle, and Hund's rule. When electrons are in the lowest - energy state, the atom is in its most stable configuration.

• The radius of an atom is related to factors such as the number of electron shells and nuclear charge, not directly to the ground - state electron configuration in terms of being the "smallest radius" as a defining characteristic.
• The distance between electrons is influenced by electron - electron repulsions and orbital shapes, but the key defining feature of the ground - state is energy.
• The number of orbitals is determined by the quantum numbers and the type of atom (e.g., for a given atom, the number of orbitals in a particular sub - shell is fixed), and having the "most orbitals" is not the criterion for the ground - state.

Answer:

lowest energy.