Chem_discussion_S10_final_key[1]

Chem_discussion_S10_final_key[1] - Chemistryactivity_key...

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Chemistry activity_key 1.  (a) atomic weight or mass number (b) protons + neutrons  (c) atomic number (d) protons (e) 15 electrons – same as protons 2. presence of unpaired electrons in its valence shell. 3. sulfur 4. 2 5. 2 6.  Inert elements have full outer shells and hence have no need to gain or lose electrons to fill a  shell; thus don’t expect to see them as a component of a compound (a combination of atoms) 7.  28.6 days  8.   (a) 8 electrons in outer shell- now full; total electrons in Cl -  are (17+1) = 18 (b) complete outer shell (valence shell) of electrons 9.   a) 11, b)3, c) 2, 8, 1 10.  (a) solvent, solute (b) solute (c) solute (d) solvent
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11.   MgCl 2  composed of 1 Mg + 2 Cl. atomic weight of Mg = 24 atomic weight of 2 Cl = 2 (35) = 70 thus atomic weight of MgCl 2  = 24 + 70 = 94 So weigh out 94 grams of MgCl 2  and put in distilled water and bring total volume after 
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Chem_discussion_S10_final_key[1] - Chemistryactivity_key...

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