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Science Unit test 1

>:)

PromptAnswer
What are compounds Pure substances with 1 or more elements chemically combined.
What is a molecule a structure made of two or more atoms
What is a valence electron Electrons on the outermost shell of an atom
What are the elements arranged by increasing Atomic number
Elements in the same group/family (columns) are arranged by the same number of valence electrons and also reactivity
Where are the least reactive metals the middle
Elements within a group have: similiar properties
The first group of the elements is solid at room temperature: true/false True
Created by: user-1627054
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