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Basic Atomic Structure Worksheet VEN 1. The 3 particles of the atom are: a protors (7) b. elecyins (2) c. ms_(o Their respective charges are: a. MESHING, b. voctive c. Amutyal 2. The number of protons in one atom of ar elerrient determines the atom’s Sty aanele , and the number of electrons determines the (: hy A woe of the element. 3. The atomic number tells you the number of f votons in one atom of an element. It also tells you the number of ole ( A Ons in a neutral atom of that element. The atomic number gives the “identity” of an element as well as its location on the periodic table. No two different elements will have the atomic number. 4. The lal ss of an element is the average mass of an element's naturally occurring atom, or isotopes, taking into account the YQ dy os of each isotope, 5. The YN OA of an element Is the total number of protons and neutrons in the YVACAGAAR of the atom. ‘6. The mass number is used to calculate the number of in one atom of an element. tn order to calculate the number of neutrons you must subtract the TWA nM from the WOKS . UNGAL- RAUNber) 7. Give the symbol of and the number of protons in one atom of: uithium id. Se Bromine Br Bot {ron 2: * Copper i A. 29 at as a pe Oxygen x Mercury + a8 7 Krypton Kr, 36 pt Helium it 8. Give the symbol of and the number: of electrons in a neutral atom of; s Uranium U ¢ 2 € lodine TJ. 523e Boron KB 5e : Xenon Xe ste 7 Chlorine ( A t Me : 9. Give the symbol of and the number of neutrons in one atom of: (Mass numbers are ALWAYS whole numbers...show your calculations) Barium BO. ; 138- 5 = G22? Bismuth Bi 209 = &3 = hon? Carbon CG. I2-G = © n® Hydrogen ial -\-= © ne? Fluorine _F 14-4 = 20n° Magnesium, Ma 2H - EH ADiy® Europium Eu, 192 -(93 = & n° Mercury {= = }2) n° 
