Which two options describe behaviors of particles that are related to the chemical properties of the materials?
A. Allowing electrons to move freely between them
B. Easily forming bonds with atoms of other elements
C. Changing their positions relative to one another
O
D. Combining with oxygen atoms to form a new substance

answer: (431,2)

step-by-step explanation:

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there are no contact forces mentioned on the list of choices that you've provided.