http://www.ck12.org Chapter 23. The Atom
- When the concept of describing the trajectory of an electron was given up, what description of the electron
replaced it? - If the shape of the electron orbital is spherical, how many values are possible for the quantum numberl?
Review
Questions
- If we were dealing with an atom that had a total of 20 electrons in its electron cloud, how many of those
electrons would have quantum numbern=1. - What is the total number of electrons in thep-orbitals of the second energy level?
- How many energy levels are necessary to contain the first 10 electrons in an electron cloud?
- quantum:A quantum is a discrete packet of energy.
- photon:A photon is a quantum of electromagnetic radiation.
- probability distribution:In quantum mechanics, the probability distribution is a mathematical function that
gives the probability of finding a particle in any small region of space. - Schrodinger’s equation:An equation describing the state and evolution of a quantum mechanical system,
given boundary conditions. Different solutions to the equation are associated with different wave functions,
usually associated with different energy levels. This equation is fundamental to the study of wave mechanics. - orbital:The wave function of an electron in an atom or molecule, indicating the electron’s probable location.
- quantum number:A number used when describing the energy levels available to atoms and molecules. An
electron in an atom or ion has four quantum numbers to describe its state.