IB Chemistry Unit 2 SL Latest Version Rated A+

IB Chemistry Unit 2 SL Latest Version Rated A+ Emission spectrum An emission spectrum is produced when an atom moves from a higher to a lower level. The line emission spectrum of hydrogen provides evidence for __________________ which converge at _____________ The line emission spectrum of hydrogen provides evidence for the existence of electrons in discrete energy levels which converge at higher energies. Continuous spectrum All the colours / wavelengths present merge smoothly into one another; A continuous spectrum is produced when white light source like the sun is passed through a prism. Line spectrum A spectrum with only some discrete colours / wavelengths present. Shell The main (principle) energy levels where the electrons are located Maximum # of e- in a main energy level 2n^2, with n being the energy level Subshell A set of degenerate orbitals within a shell What is the order (least to most E) of orbital types in a Subshell s subshell, p subshell, d subshell, and f subshell Hydrogen emission The visible part of the line spectrum: four lines: red, aqua, blue, violet with the lines converging towards higher energy (violet). All of the visible lines are caused by a nf=2 transition. There are also lines in the UV caused by nf=1 transitions and lines in the IR caused by nf=3 transitions. Orbital A region of space around an atomic nucleus in which there is a high probability of finding the electron. Compare and contrast Bohr and Schrodinger model of e- arrangement In the Bohr Model, the electron is treated as a particle in determined, 2D orbits around the nucleus. In the Schrodinger model, the electron is treated mathematically as a wave with a probabilistic location in a 3D orbital volume around the nucleus. In both models the electron energy and location are quantized. What is the relationship between frequency, energy and wavelength along the electromagnetic spectrum? Where: λ is the wavelength ν is the frequency E is the energy c is the speed of light h is Planck's constant λ = c / ν (so wavelenth and frequency are inversely proportional) E = h × ν (so energy and frequency are directly proportional) Aufbau Electrons are placed into orbitals of