HW 12-2-08

HW 12-2-08 - b How do their characteristic properties...

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Joseph Leonard Green H P156 #7-11 12/2/08 7. a) What information is provided by the specific block location of an element? The block an element is in tells in what type of orbital the last electron typically falls. b) Identify, by number, the groups located within each of the four block areas. The s -block is group 1 and 2. The d -block is group 3through 12. The p -block is group 13 through 18. The f -block is the lanthanides and actinides. 8. a) Which elements are designated as the alkali metals? The elements in group 1 b) List four of their characteristic properties. Silvery appearance Soft enough to cit with a knife Combine vigorously with most nonmetals Not found in nature as free elements 9. a) Which elements are designated as the alkaline-earth metals? Elements in group 2
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Unformatted text preview: b) How do their characteristic properties compare with those of the alkali metals? They are harder, denser, and stronger than the alkali metals. 10. a) Write the usual group configuration notation for each d-block group. 3 – d¹ 4 – d² 5 – d³ 6 – do o 7 – do 8 – d ⁶ 9 – d o 10 – d o 11 – d¹º 12 – d¹º b) How do the group numbers of those groups relate to the number of outer s and d electrons? Starting with the first group in the d-block, the outermost d orbital has one electron, and as you get deeper into the d-block, the d orbital gets more filled. The s orbital is usually filled except for the few exceptions. 11. What name is sometimes used to refer to the entire set of d-block elements? Transition metals...
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This note was uploaded on 12/09/2009 for the course CHEM 204 taught by Professor Donnegan during the Spring '08 term at Alabama.

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