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Two carbon atoms (Group 14) bond with two hydrogen atoms (Group 1) to form acetylene (

C
2
H
2
). How would each carbon atom in acetylene bond?

(1 point)
Responses

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 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 the other carbon atom and two pairs with each hydrogen atom.

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

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

1 answer

In acetylene (C₂H₂), each carbon atom forms a triple bond with the other carbon atom and a single bond with a hydrogen atom.

Here’s how the bonding occurs:

  • Each carbon atom shares three pairs of electrons (or forms a triple bond) with the other carbon atom.
  • Each carbon atom shares one pair of electrons (or forms a single bond) with one hydrogen atom.

Thus, the correct description of the bonding in acetylene is:

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