Car won't start after sitting for two weeks

As the title says, I haven't used my car for (nearly) two weeks since I was out of state on vacation. I turn the key in the ignition and nothing happens, no click, no sound, no lights, nothing. I tried turning stuff like the headlights on while the key was turned and nothing happened. I have a hard time believing the battery would be old/dead since I'm fairly certain I had it replaced 1-2 years ago when the alternator failed, which I know I had replaced around the same time. Is it possible for a car or some component in it to go bad/dead after no use for almost 2 weeks?

If it helps, I live in Florida and my car is a 2004 Pontiac Grand Prix.