PERIODIC - Periodic Relationships 1 An atom of an element...

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Periodic Relationships 1. An atom of an element has 16 electrons. Without using a periodic table, write the electron configuration of the element. Is the element a metal, non-metal or metalloid? Is the element paramagnetic or diamagnetic? Does this element form a cation or an anion? Write the electron configuration of the ion. What other element has the same electron configuration? What is the empirical formula for the compound formed from sodium and this element? 2. Arrange the following sets of atoms in order of increasing size and explain your ranking. a. S, O, N b. Be, Mg, Li c. C, Si, F d. B, Al, Si 3. Although atomic radius tends to decrease as you move from left to right across a row in the periodic table there are exceptions. One such exception is Ge, radius = 137 pm, and As, radius = 139 pm. Discuss possible reasons for this exception. 4. Arrange the following ions in order of increasing size and explain your choices. a. K + , Ca 2+ b. S 2- , Cl - d. Na + , F - e. Fe 3+ , Fe 2+ 5. The first and second ionization energies for sodium and magnesium are as follows:
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This note was uploaded on 11/15/2010 for the course CHEM Chem 150 taught by Professor Karenkreutzer during the Winter '05 term at Shoreline.

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PERIODIC - Periodic Relationships 1 An atom of an element...

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