will items disappear in minecraft if the player didn't pick them up for too long time

In Minecraft, items that are dropped on the ground will disappear if they are not picked up for a certain amount of time. The exact duration depends on the game version and settings:

1. Single-player Game: Items dropped by players or mobs in single-player mode will despawn after 5 minutes (300 seconds) without being picked up.

2. Multiplayer Server: On a server, the item despawn rate can be configured by the server administrators. It could be less than or more than 5 minutes, depending on the server settings.

3. Adventure Mode: If a player is in Adventure mode without cheats enabled, they cannot pick up items, and the items will despawn as usual.

4. Spectator Mode: In Spectator mode, players cannot interact with items at all, so items will also despawn.

5. Chunk Unloading: If an item is in a chunk that gets unloaded due to being far from the player, it may despawn.

6. Game Rule Changes: If the "doTileDrops" game rule is set to "false," items will not drop from blocks or entities upon destruction.

It's always a good idea to collect important items quickly to avoid losing them.