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Columns in the periodic table are called groups, and the rows are called periods. Notice that the groups are labeled 1 to 18 and the periods are labeled 1 to 7. Groups 1, 2, and 13 to 18 are called the main group elements, groups 3 to 12 are the transition elements, and the bottom two rows are called the lanthanides and actinides, respectively.
This table gives properties and alternate names for some of the groups:
Group Name Properties1 Alkali metals React to form 1+ ions.2 Alkaline earths React to form 2+ ions.17 Halogens React to form 1 ions.18 Rare gases(noble gases) Stable and unreactive. (Elements from othergroups form ions to achieve the same numberof electrons as a noble gas.)
i) What is the atomic number of the element located in group 16, period 2 of the periodic table? Enter the atomic number.
ii) If a new element were discovered and it was found to form 1 ions, in which group would you place it in the periodic table? Enter the group number.
Show all the steps in the mechanism for the following reaction, When benzene is mixed with deuterated sulfuric acid, deuterium is slowly incorporated onto the ring. Show the mechanism for this reaction and explain how this relates the sulfonation of ..
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