In what way does electron spin contribute to the stability of an atom?

• A. By changing the atomic number, the element’s identity is modified in the atom.
• B. By altering the atomic radius, the size of the atom is affected by electron arrangement.
• C. By increasing the number of electrons in an orbital, the atom’s configuration is adjusted.
• D. By ensuring electrons are paired with opposite spins, reducing repulsion.

Answer: (D)