The energy difference between the o2 molecule and the separated atoms is the result of the attractive forces between the atoms. The atoms are attracted to each other because of the electrostatic force, which is created by the imbalance of the electrons between the atoms. When the atoms are close together, the electrons are attracted to the nucleus of the other atom, and this creates a force that pulls the atoms together.
Other related questions:
Q: What is the difference between an oxygen molecule and an oxygen atom?
A: An oxygen molecule is made up of two oxygen atoms bonded together, while an oxygen atom is a single atom.
Q: What are the differences between atoms and molecules?
A: Atoms are the basic units of matter and the defining structure of elements. The term “atom” comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be divided. The structure of an atom is a central nucleus composed of protons and neutrons with electrons orbiting around this nucleus.
Molecules are groups of atoms held together by chemical bonds. They are the smallest units of a compound that have the chemical properties of that compound. Molecules can be very simple, such as the molecule of water (H2O), or they can be very complex, such as the molecule of DNA.
Q: What happens when you split oxygen atoms?
A: When you split oxygen atoms, you create two new atoms of oxygen.
Q: Is O2 an atom or molecule?
A: O2 is a molecule.
Bibliography
- notation – What is the difference between O & O2
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- Bond Energies – Chemistry LibreTexts