I built a molecular model of methylene (CH₂) using a ball-and-stick molecular modeling kit. I started with one black ball representing a carbon atom and two smaller white balls representing hydrogen atoms. I then used two white plastic connecting rods to attach the hydrogen atoms to the central carbon atom, representing two single covalent bonds. I also attached two additional rods to the carbon atom without hydrogen atoms at their ends.

These extra rods help illustrate the available bonding positions in the modeling kit, although they do not represent additional chemical bonds in methylene. Unlike methane (CH₄), which has four hywdrogen atoms arranged in a tetrahedral structure, methylene contains only 1two hydrogen atoms and has a bent molecular geometry.
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