Electronic Config And Radiation Flashcards
Master
Associate an Orbital with a probability function
An orbital describes the “likelihood that an electron will be found in a particular location.
Heisenberg principle.
states that It is impossible to know
both the position and the momentum of an electron at the same time.
De Broglie’s Hypothesis
He postulated that matter (electrons) could’ve the properties of waves of electromagnetic radiation.
failure of Bohr’s model of an atom
electrons do not circle the nucleus as planets move around the sun. Electrons do not orbit, instead they exist in things called orbitals.
Quantum theory
electromagnetic energy
is quantized: for a given frequency of radiation (or light), all possible
energies are multiples of a certain unit of energy, called a quantum. So, energy changes do not occur smoothly but in small and specific steps
The Aufbau principle
states that a subshell is completely filled
before electrons are placed in the next higher subshell EXCEPT for Cr and Cu + Hybrid orbitals
A collection of orbitals with roughly similar sizes constitutes ??
An energy shell
Relate the energy of electrons that are further and those that are near to the nucleus
Those that are further have greater energy. So electrons in the orbitals of larger energy shells have greater energy than those in the orbitals of smaller energy shells.
Orbitals that have the same shape in a given energy shell comprise ??
A subshell
Shapes of orbitals in subshells
S: always consists of one spherical orbital
P: always consists of three dumbbell shaped orbitals
d & f: always consists of 5 and 7 oddly shaped orbitals
What is the ground state
It is the config. of the electrons in an atom under standard conditions.
Excited state def and how many energy levels are jumped
Energy could cause an e to move from a lower energy level to a higher energy level.
N.B: an electron could jump more than one energy level, so there are many possible configurations.
What happens when electrons at a high energy state, which are not stable, of a n excited atom fall back to a low energy state
They emit a specific wavelength of energy that corresponds to the distance they fell btn energy levels called the EMISSION SPECTRUM
