![]() The smaller the radius, the stronger the attractive force.The larger the core charge, the more strongly are the valence electrons are attracted.To understand its chemistry, a student needs to consider only three facts about each atom. Students don't have to wade through the details of a B-R atom. They are also the three most visible features of each diagram. The core charge, the radius, and the valence occupation are the three features that students use to make judgments about the chemical behavior of the elements. That's it! Rows three and four are exactly the same, except that each valence shell is slightly larger in the lower rows. ![]() (The number of valence electrons equals the core charge.)
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