"Write chemical reactions" four ammonia molecules (NH3) react with four oxygen molecules(O2) to form four nitrogen monoxide molecules (NO) and six water molecules. all substances are in gaseous state and heat is released in the chemical reaction

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

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