In straight-chain alkanes,the carbon atoms on each end of the molecule always form bonds with ________ atoms of hydrogen;the carbons within the molecule always form bonds with ________ hydrogen atoms.

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In straight-chain alkanes, the carbon atoms at each end form bonds with 3 hydrogen atoms (since they also bond with one other carbon atom), while the carbons within the molecule form bonds with 2 hydrogen atoms (since they bond with two other carbon atoms).

In Straight-Chain Alkanes,the Carbon Atoms on Each End of the Molecule