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- 3. a group of energy levels of an atom
- 5. the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom
- 6. the fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have.
- 7. In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule
- 8. the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
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- 1. The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends.
- 2. a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
- 4. tending to lose electrons and form positive ions in chemical reactions.
- 6. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.