5 Electrons In Atoms Flashcards
The Bohr Model
introduced by Niels Bohr and Ernest Rutherford in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus
Quantum
Amount of energy required to move an electron from one level to another
Quantum Mechanical Model
uses complex shapes of orbitals (sometimes called electron clouds), volumes of space in which there is likely to be an electron
S, P, D
Sphere, dumbbell, clover-leaf
Atomic Orbitals
Principle energy levels n = 1 has 1s (etc)
Unstable
When an atom is in its excited state
Pauli exclusion method
Each atomic orbitals can hold up to two electrons
Hunds rule
Every orbital is singly occupied with one electron before any other orbital is doubly occupied
Electron configuration
the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals