Electron in Atom Which of the following best describes an electron’s behavior in an atom? A.The electron is nearly stationary inside the nucleus B.The electron is nearly stationary outside the nucleus C.The electron orbits in a definite path around the nucleus D.The electrons wavefunction is at many places around the nucleus at the same time.

Hydrogen Energy Levels Which is the higher energy level? A.E = eV B.E = eV A is n=4 B is n=5 Higher n makes E less negative, therefore the electron has more energy

PAL – part A  No justification necessary for part A: 1.Observe Hydrogen spectrum a)How many lines do you see? b)What colors do you see? Check off the H- spectrum lines that you see  red  blue-green  violet 2.Compare this to spectrum of more complex atom with more electrons, such as argon a) How many lines do you see? b)Do you see more lines with a simpler or more complex atom?

PAL - part B An electron in a hydrogen atom initially has an energy of eV. It makes a transition to the ground state. A) Which state is the electron in initially (give a value of n)? n=3 B) What value(s) of ℓ could this electron have? 0, 1, or 2 C) If the electron has the second-highest possible value of ℓ, what value(s) of m ℓ could it have? -1, 0, or +1 C) Find the energy and the wavelength of the photon given off in transition. Is it visible light? 13.1 eV, 103 nm, no (it is UV)