Hey!
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Answer:
It can form four covalent bonds.
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Step-by-step explanation:
It can become an ion - It can't become an ion.
It is abundant on earth - It is abundant but doesn't say why it's in so many molecules.
It has valence electrons - Carbon has 4 valence electrons that are used in chemical bonds. But not necessary in why carbon is present in a lot of molecules.
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Hope This Helped! Good Luck!