Can seeds go bad?

Ok i know im going to sound like a moron but i honestly don't know the answer to this. Can seeds go bad after a while? like lets say you get a big deal on the internet and your getting a total of 35 seeds. It is a value pack and you get three ten packs of different types of bud well seeds pulse five super silver seeds for free. My friend ordered from the site and they didn't rip him off and he grew his shit already. Well we can't grow all the plants at one time we are thinking maybe 6 for now then when they hit the flowering stage make another room for vegetating for another six plants. So will the seeds go bad by them or no?

Seeds go bad relatively quickly. Store them properly though - dry and cool and they can last up to a few years. Take care to store those seeds and they will be fine to pop after this grow.