The Structure Of The Atom
The Structure of the Atom
| Concept | Description |
|---|---|
| Atomic Number (Z) | The number of protons in the nucleus of an atom. |
| Mass Number (A) | The sum of the number of protons and neutrons in the nucleus of an atom. |
| Isotopes | Atoms of the same element with the same atomic number but different mass numbers. |
| Isotones | Atoms of different elements with the same mass number but different atomic numbers. |
| Isobars | Atoms of different elements with the same mass number and the same number of neutrons, but different atomic numbers. |
| Electron Configuration | The arrangement of electrons in shells and subshells around the nucleus of an atom. |
| Periodic Table | A tabular arrangement of elements organized by their atomic number, electron configuration, and recurring chemical properties. |
| Quantum Numbers | A set of four numbers (n, l, ml, and ms) that describe the properties of an electron in an atom. |
| Electron Shells | The main energy levels of an atom, labeled from K to N. |
| Electron Subshells | The subdivisions of electron shells, labeled from 0 to (n-1). |
| Orbitals | The three-dimensional regions where electrons are most likely to be found. |
| Electron Spin | The intrinsic rotation of an electron, which can be either “spin up” or “spin down”. |
