If you mean endstone,
the ID is 121
Ender Crystals could be spawned using Spawn Eggs with ID 200
That is just a block, you can`t hatch it YET.
There's no spawn egg for enderdragon.
Block ID Name Numerical ID Still Lavalava11Flowing Lavaflowing_lava10
Technically, there is no real "end" to Minecraft, but you could count the defeat of the Ender Dragon as the furthest point in the game.
the ender dragon egg is an item, an ip is used to connect to a server. you probably want the item ID which i believe is 122to get it press tand type /give (your name) 122 1
The actual Portal's ID is 90. The frame of the portal, Obsidian's ID is 49.
The Ender Dragon is a part of Minecraft, not a mod. You probably need to update Minecraft.
There is no command block in minecraft. If you go to the Minecraft WiKi it will have all the information you need for anything in the game.
Nether Portals are constructed from Obsidian, so that's the block you would need. The Block ID for obsidian is 49 (command /give 49 1, remove if playing single player) and a Flint and Steel to activate the portal.If you mean the end portal, the block ID for End portal blocks is 120 and you'd need Eye(s) of Ender to activate this portal.
The Minecraft block ID for lava is 10 or 11 for stationary and flowing lava respectively.
The eye of ender hovers because it follows the ender and is magical!