Examlex
Lack of ____________________ makes system maintenance difficult at best and impossible at worst.
Electron Shells
Electron shells are layers of electrons that surround the nucleus of an atom, where each shell has a different energy level.
Silicon
A chemical element with the symbol Si, known for its semiconductor properties and used extensively in electronic devices.
Anions
Negatively charged ions that are formed when an atom gains one or more electrons, commonly found in various chemical reactions and solutions.
Electrons
Electrons are subatomic particles with a negative charge, found in all atoms, and play a key role in chemical reactions and electricity.
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