# Arrangement of Electrons in Atoms Vocab Flashcards

Terms Definitions
 Photon A particle of electromagnetic radiation having zero mass and carrying a quantum of energy. wavelength the distance between corresponding points on adjacent waves How is frequency expressed ? In waves/second Amplitude disturbance of wave from median (middle of wave to highest/lowest point) e=hv energy of photong= frequency of radiation x planck's constant line-emission spectrum electromagnetic spectrum produced when radiations from emitting source are dispersed ground state lowest energy state of an atom highest occupied level the electron-containing main energy level with the highest principal quantum number Hertz Found that when light of sufficiently high frequency was shone on the surface of a metal, electrons were ejected from the metal. This phenomenon is called the photoelectric effect. It indicated a direct relationship between the energy and frequency of light. Which travels at a higher speed, ultraviolet or infared light? ... Quantum number specify the properties of atomic orbitals and the properties of electrons in orbitals frequency number of cycles or vibrations per unit time; number of waves produced in a given amount of time Photoelectric effect Refers to the emission of electrons from a metal when light shines on the metal. quantum numbers these specify the properties of atomic orbitals and the properties of electrons in orbitals quantum is the minimum quantity of energy that can be lost or gained by an atom electromagnetic radiation a form of energy that exhibits wavelike behavior as it travels through space Speed of light (c) frequency (v) x wavelength (λ) How are the energy and wavelength of electromagnetic realted? ... speed of light (c) same for all electromagnetic radiation noble-gas configuration/notation an outer main energy level occupied, in most cases, by eight electrons. It's a way of simplifying an element's electron configuration by comparing it to the closest noble gas that has a lower atomic value. de broglie's relation equation that relates the wavelength, λ, and frequency, f, to the momentum, p, and kinetic energy, E Continuous spectrum the emission of a continuous range of frequencies of electromagnetic radiation Quantum Theory a theory that explains the behavior of electrons in atoms radiation is is emitted or absorbed only in whole numbers of photons excited state state in whch an atom has a higher potential energy that it has in its ground state What information is given by the angular momentum quantum number? Shape of an orbital 3 Types of Electromagnetic Radiation Visible- Balmer series, UV- Lyman series, IR- Paschen series bright line emission spectrum is unique to that element and, hence, can be used to identify an element (much the same way as a fingerprint can be used to identify a person). dual-wave particle theory of light light can be thought of as a wave (diffractions and interferences) and as a stream of particles in other experiments (photoelectric effect) energy levels of the electron in a H atom are definite, there is a mathematical relationship between the various energy states of the H atom
/ 30
Term:
Definition:
Definition: