Overview

Henry and Mary are back from school. Tom-the-Atom introduces them to the Iron atom (Fe) a larger rust-colored atom, which is a cousin of Tom-the-Atom is in Group 3B belonging to a large family called the Transition Metals comprising Columns 3-12 in the Periodic Table. Iron is very versatile and to understand his valence electron configuration (outermost shell electrons), it is necessary to introduce the concepts of shell and sub-shells. Iron, represented by Fe, is more significant than Tom-the-Atom; Fe has two valence electrons ( hands and six empty sleeves ) in his outer shell.Tom-the-Atom introduces the concept of Sub Shells or Sub Belts. This concept shows that larger atoms with more than one shell have sub-shells. The subs-hells are like the layers of an onion! If any larger atom has more than a total of 10 electrons, (he or she will have two electrons in his inner shell K and 8 in his shell L) and new shells will appear to accommodate those additional electrons. The shell will have sub-shells, and only the outer sub-shell will contain the valence electrons. Most of the larger and heavier atoms will have in their outer sub-shell from one to eight valence electrons and from seven to zero empty spaces--to add up to 8.

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9781652948001

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