alleryStart learning →Elements in which the s and p orbitals are being filled are classified as:
Arepresentative elements
Btransition elements
Cinner transition elements
Dnoble gases only
Answer & Solution
Correct answer: A. representative elements
1. The periodic table can be divided into blocks according to which orbital type is being filled with the last electron.
2. The text states: "The representative elements are elements where the s and p orbitals are filling."
3. Transition elements instead have d orbitals filling, and inner transition elements have f orbitals filling.
4. So elements filling s and p orbitals are, by definition, the representative elements.
_Source: OpenStax Chemistry Ch 18 "Representative Metals, Metalloids, and Nonmetals", p.964 §18.1 Periodicity_
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