Connections

Puzzle #736

🟪🟪🟪🟪

🟩🟩🟩🟩

🟦🟦🟦🟦

🟨🟨🟨🟨

Bit of thinking but got this one rather easily. That was after having it start with Inanimate Carbon and Rod all together on the top row and all I could think of was the Simpsons episode Homer the Astronaut.

May also be my first Purple first one.