Can you buy arbitrum on Uniswap?

Excuse me, I was wondering if you could clarify something for me. I've been hearing a lot about Arbitrum and its potential in the cryptocurrency space. I'm particularly interested in purchasing some, but I'm not sure if Uniswap supports it. Could you tell me if it's possible to buy Arbitrum tokens directly on Uniswap, or if there's another platform I should be using? I'd really appreciate your help with this.