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The electron shell.
The space occupied by the electrons in an atom is called the electron cloud.
The electron in the highest occupied energy level is known as the valence electron. These electrons are involved in the formation of chemical bonds and determine the element's chemical properties.
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Most of the volume in an atom is occupied by the electron cloud. Most of the complex reactions of the atom occur in the cloud.
Only two electron shells.
The region around the nucleus of an atom occupied by electrons is called the electron cloud or electron shell. This is where electrons are most likely to be found based on their energy levels or orbitals.
When it is stable. that is, all of it's electron shells are fully occupied.
Hund's rule states that electrons pair up only after each orbital in a sub-level is singly occupied by electrons with the same spin. This minimizes electron-electron repulsion, leading to more stable electron configurations.
It is the proportion of the spinner's perimeter that is occupied by the section (or sections) with a value of 1.
Sodium has one electron in its highest occupied energy level.
Iodine (I) is the halogen with four occupied electron shells. It belongs to group 17 of the periodic table and has 53 electrons, filling up the first four electron shells.