6.2 What does the nucleus determine about an atom? The mass and the number of electrons needed to give the atom electric neutrality. What part of an atom is involved in chemical reactions? The outer part (i.e. the electrons). Not the nucleus. Define electronic structure. How electrons are distributed about the nucleus. Define electromagnetic energy. Energy carried through space or matter by means of wavelike oscillations of magnetic and electric fields. Give the name and symbol for cycles/second. Hertz ( v ) Distinguish between Hz and frequency. Frequency refers to cycles per some time. Hz refers to cycles per second . Give the equation for velocity of EM radiation. c = λ x v = 3.0 x 10 8 m/s (also known as the speed of light). List the classes of EM radiation in the EM spectrum (from lowest frequency to highest). Radio waves, infrared, visible, ultraviolet, x-rays, gamma rays. (RIVUX G) Which is faster, radio waves or gamma rays? They are both the same speed ( c = 3 x 10 8 ) What is a photon? A photon is a short wave. All EM radiation consists of small
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This note was uploaded on 04/12/2011 for the course CHEM 1010 taught by Professor Marshall during the Spring '11 term at North Texas.