<span>Answer: c. the number of valence electrons in atoms of the element
The valence electrons determine how it would bond and if it would react.</span>
A particle is a minute fragment or quantity of matter. In the physical sciences, a particle is a small localized object to which can be ascribed several physical or chemical properties such as volume or mass. ... The term is rather general in meaning, and is refined as needed by various scientific fields.
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<span>Formed when two or more atoms chemically bond together, the resulting compound is unique both chemically and physically from its parent atoms</span>
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- Hannah ❤
I'm pretty sure its momentum