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Worksheet2_AtomsFormulasNamesMoles

Worksheet2_AtomsFormulasNamesMoles - Chem142,Autumn2011...

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Chem 142, Autumn 2011 Name ______________________ 1 of 4 Group Activity 2: Atomic Structure, Atoms and Ions, Naming Compounds 1. A. Which particles contribute most of the mass to the atom, and where are these particles located? B. Which particles contribute most to the volume or size of the atom, and where are these particles located? C. What information is provided by the atomic number, Z, which is the subscript in the nuclear symbol? D. What information is provided by the mass number, A, which is the superscript in the nuclear symbol? F. In general, what feature of an atom identifies it as a particular element? E. Insert the missing information in the following table. The first row is completed for you as an example. Name Symbol Z A # of neutrons # of electrons boron‐10 10 B + 5 5 10 5 4 40 Ca 2+ 20 18 oxygen‐16 8 9 19 10 39 20 19
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Chem 142, Autumn 2011 Name _____________________________ 2 of 4 2. A. For each atomic symbol below, write the name; for each name, write the symbol. B. Indicate which ion(s) the following elements usually form. Symbol Ion(s) Na S Ca F Cu C. Indicate the type of bond (ionic or covalent) expected in each of the following
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