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The correct answer is It refers of an atom with fewer electrons than are necessary for maximum stability.
The Boron group family, or Group 3A(13), consists of the following elements:
- Boron
- Aluminum
- Gallium
- Indium
- Thallium
Electron Deficiency: It describes the atom which has fewer number of electrons required for maximum stability. For the given Boron family, atoms having less than 8 electrons are electron deficient.
The phrase "electron deficiency" refers to atoms and molecules that do not have as many electrons as are necessary for their maximal stability. The main group atoms in a molecule and the transition group atoms with fewer than eight and eighteen electrons, respectively, are referred to as electron deficient.
The number of electrons in an atom's outermost shell, which is eight in total, determines whether a compound is electron-deficient or electron-rich. Compounds that lack enough electrons to form covalent bonds are referred to as electron-deficient compounds.
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