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Unit 2: the atom
the atom and periodic table.
| Term | Definition |
|---|---|
| Atomic radius | 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. |
| Chemical family | Chemical Family means a group of elements in the Periodic Table or, more commonly, compounds that share certain physical and chemical characteristics and have a common name. |
| EM spectrum | The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies. |
| Electronegativity | Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond. |
| Frequency | Frequency is defined as the number of times an event occurs per unit of time. |
| Ionic radius | The ionic radius is the distance between the nucleus and the electron in the outermost shell of an ion. |
| Ionization Energy | Ionization energy or ionisation energy is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule. |
| Isotopes | |
| Planck's constant | |
| Valence | |
| Wavelengh |
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