what product could you see in a flask when you cobined copper and sodium. basically what is the name for copper and sodium when combined

I know Na is very very reactive; however, my gut feeling is that Cu and Na will not react at room temperature. I've never been asked this question before nor have I thought about it. Copper metal is generally not very reactive and both Na and Cu want to give away their electrons to become positively charged ions; therefore, I don't see a reason for them to combine.