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3. Which of the following best differentiates between an element and a compound?

A. Elements are always metals and compounds are always non-metals.
B. Elements can be decomposed by chemical reactions; compounds cannot.
C. Compounds have a fixed composition by mass; elements do not.
D. Elements consist of one type of atom; compounds consist of two or more types of atoms chemically combined.



Answer :

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Final answer:

A compound is made up of multiple elements in a fixed ratio, while an element is the simplest substance. Compounds can be broken down through chemical reactions.


Explanation:

A compound is composed of two or more elements combined in a fixed ratio. An element is the simplest chemical substance. Compounds can be broken down into simpler substances through chemical reactions.


Learn more about Element vs. Compound here:

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Answer:

D.Elements consist of one type of atom; compounds consist of two or more types of atoms chemically combined.

Explanation:

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