Which one of the following is a main-group element?
A)Ce
B)Co
C)Cu
D)Cs
E)none of the above

Name: Which one of the following is a main-group element? A)Ce B)Co C)Cu D)Cs E)none of the above
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Question

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Main-group elements are located in the s and p blocks of the periodic table. Cs (cesium) is an alkali metal in group 1, which is part of the s-block, making it a main-group element. Ce (cerium), Co (cobalt), and Cu (copper) are transition metals located in the d-block and are not considered main-group elements.

Which One of the Following Is a Main-Group Element