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- 3. A metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well
- 4. s a tabular display of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is generally seen as an icon of chemistry.
- 6. In physics and chemistry, ionization energy or ionization energy is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule
- 10. a region of an atom in which electrons of the same energy are likely to be found
- 11. are those in which the last electron enters the outermost s-orbital.
- 12. The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons
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- 1. In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.
- 2. Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements.
- 5. The noble gases make up a class of chemical elements with similar properties; under standard conditions, they are all odorless, colorless, monatomic gases with very low chemical reactivity.
- 7. symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.
- 8. In chemistry, a group is a column of elements in the periodic table of the chemical elements.
- 9. defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion.