Electromagnetic Radiation and Valence Electrons

Introductory Chemistry, 2e (Tro) Chapter 9 – Electrons in Atoms and the Periodic Table True/False Questions 1) When the elements are arranged in order of increasing number of protons, certain sets of properties recur periodically. 5) A particle of light is called a packet. 9) Ultraviolet light produces suntans and sunburns. 13) Electrons behave like particles and we can describe their exact paths. 17) The ground state is when an electron in an atom is excited into the lowest possible vacant orbital. 21) Bromine has 17 valence electrons. 5) The atomic radius of lithium is larger than the atomic radius of nitrogen. Multiple Choice Questions 29) The number of cycles of a wave that passes a stationary point in one second is called its A) wavelength B) frequency C) crest D) trough E) none of the above 33) Which color of the visible spectrum has photons with the most energy? A) red B) orange C) green D) violet E) yellow 37) Which form of electromagnetic radiation has the longest wav elength? A) Radio Waves B) Microwaves C) X-rays D) Gamma Rays E) Infrared Radiation 41) Which form of electromagnetic radiation has photons with the lowest energy?A) Radio Waves B) Microwaves C) X-rays D) Gamma Rays E) Infrared Radiation 45) Which statement below does NOT follow the Bohr Model? A) When energy is absorbed by atoms, the electrons are promoted to higher-energy orbits. B) When an atom emits light, electrons fall from a higher orbit into a lower orbit. C) The energy emitted from a relaxing electron can have any wavelength. D) Electrons exist in specific, quantized orbits. E) none of the above 49) How many subshells are there in the n = 4 principal shell?A) 1 B) 2 C) 3 D) 4 E) not enough information 53) Which one of the following is the correct orbital diagram for nitrogen? A) ^v ^v v v ^ B) ^v vv v ^ ^ C) ^v vv ^ ^ ^ D) ^v ^v ^ ^ ^ E) none of the above 57) How many electrons are unpaired in the orbitals of nitrogen? 61) How many core electrons are in a chlorine atom? A) 14 B) 5 C) 9 D) 3 E) none of the above A) 1 B) 17 C) 10 D) 7 E) none of the above 65) What do the alkali metals all have in common? A) They all undergo similar reactions. B) They all have similar physical properties. C) They all form +1 ions.D) They all have the same number of valence electrons. E) all of the above 69) The size of an atom generally increases A) down a group and from right to left across a period. B) up a group and from left to right across a period. C) down a group and from left to right across a period. D) up a group and from right to left across a period. E) up a group and diagonally across the Periodic Table. 73) Which of the following atoms is the smallest? A) Li B) Be C) B D) O E) Ne Answers 1t 5f 9t 13f 17f 21f 25t 29b 33d 37a 41a 45c 49d 53d 57d 61c 65e 69a