Enter your Name:   Enter your E-mail Address:  (h = 6.63x10^-34 Joules/Hz, c = 3.0x10^8 m/s, "nano" means 10^-9) 01. Two masses are positively charged. Will they repel or attract each other? 02. A substance has 34 positive charges and 34 negative charges. What is its overall charge? 03. What was Crooke's contribution to the science of atomic structure? 04. How many protons, neutrons, and electrons are in a 141Ba atom? 05. What is the symbol for an atom with 45 protons, 57 neutrons, and 45 electrons? 06. What is the definition of isotopes? 07. You have two light bulbs of equal brightness. One is yellow and one is indigo. What can you say about their amplitudes? Which emits light of higher frequency? 08. What is the frequency of light that has a wavelength of 10.0 nm? 09. If the energy of light emitted from an atom is 2.3x10-15 Joules, what is its wavelength? 10. Which is the heaviest: a neutron, a proton, or an electron? 11. Why does spectroscopy help chemists determine what type of atoms are in a substance? 12. An atom is emitting light. What are its electrons doing? 13. Order the three orbital shapes we have studied in terms of increasing energy. 14. What is wrong with the following electron configuration? 1s22s32p63s23p64s23d5 15a. Give the full electron configuration for the atom Ca 15b. Give the full electron configuration for the atom Nb 15c. Give the full electron configuration for the atom Fe 16a. Give the abbreviated electron configuration for the atom Fr 16b. Give the abbreviated electron configuration for the atom Cl 16c. Give the abbreviated electron configuration for the atom Cd