Explain the reactivity of the nobel gases in terms of valence electrons

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

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What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.