Two carbon atoms (Group 14) bond with two hydrogen atoms (Group 1) to form acetylene (C2 H2). How would each carbon atom in acetylene bond?

Question

(1 point)
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Each carbon atom would share one pair of electrons with the other carbon atom
and three pairs with each hydrogen atom.
Each carbon atom would share one pair of electrons with the other carbon atom and two pairs with each hydrogen atom.
Each carbon atom would share one pair of electrons with hydrogen and one pair with the other carbon atom

Answer 1

In acetylene (C₂H₂), each carbon atom forms a total of four bonds. Here's how the bonding works:

1. Between the two carbon atoms: Each carbon atom shares three pairs of electrons (a triple bond) with the other carbon atom. This accounts for six electrons (three pairs) between them.

2. With the hydrogen atoms: Each carbon atom shares one pair of electrons (a single bond) with one hydrogen atom. This accounts for two electrons (one pair) for each hydrogen-carbon bond.

So, to summarize, each carbon atom in acetylene bonds by sharing:

• Three pairs of electrons with the other carbon atom (a triple bond).
• One pair of electrons with each hydrogen atom (two single bonds total, one with each H).

Therefore, the correct statement is:

Each carbon atom would share one pair of electrons with the other carbon atom and two pairs with each hydrogen atom.

(However, typically in more detail, it should specify that there's a triple bond between the two carbon atoms and a single bond with each hydrogen.)