reviewer Flashcards
states that is not possible to determine both the momentum (angular velocity) and the position of a particle (such as an electron) at the same time.
Heisenberg’s uncertainty principle
Electron can be visualized as a moving “particle” in an orbit around the nucleus of an atom. The model however is primitive and less dependable since it is found out that electrons behave both as a “particle” and a “wave”. Thus, it does not move around a steady circular orbit but in a region of 3D shape.
Bohr’s model
The modern day model of an atom is called–which is grounded on Heisenberg’s uncertainty principle.
Cloud model or quantum model
Introduced the wave theory together with other scientists found out that a set of numbers are needed to describe the 3D coordinates of an electron in the atomic orbitals of hydrogen atom.
Erwin Schrodinger
Represents the energy level of the electron n= 1, 2, 3…
Principal Q. N (n)
tells us the atomic orbital
values of l range from 0 to (n-1)
Angular momentum or Azimuthal Q.N (l)
tells about the orientation of the atomic orbital along the xyz plane.
range values: -l, 0, l
Magnetic Q.N (Ml)
spin of electrons can only be either in clockwise/ counter clockwise or spin up/ spin down.
Spin Q.N
Is the description of how the electrons of an atom fill up the orbitals.
Electron Configuration
Electrons found at the outermost shell of an atom, and the ones which are directly involved in a chemical reactions.
Valence electrons
Electrons of ground state atoms (unchanged atoms) tend to fill first the shell, subshell, and orbitals that produce the lowest energy for the atom.
Aufbau Principle
states that electrons pair only after the orbitals in the same subshell are filled with single electrons.
Hund’s Rule
Pictorial descriptions of the electrons in an atom.
Orbital Diagrams
says that only two electrons can fit into single orbitals.
Pauli exclusion principle
The behavior of an atom in a magnetic field can be predicted using its electron configuration.
Magnetic Property
