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madisonkenyon22
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Compounds can be classified as ionic or covalent. Molecules are the simplest unit of a covalent compound, and molecules can be represented in many different ways.

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subodh2kool

Answer:

There are a limited number of elements available on the periodic table to use in compounds.

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Some elements are less reactive than others or do not react at all.

Example: some of the transition metals or noble gases.

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Many elements are unable to react with other elements because their atoms cannot align.

Example: lithium and sodium do not react with each other.

Explanation:

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