About five years before the storyline began, Uchiha Itachi and Uchiha Madara killed their entire clan in one night. The only exception was Itachi's younger brother Sasuke. See the related link below for more detailed information.
Uchiha Madara was a highly skilled ninja who lived years previously. He helped lead the Uchiha clan and was one of the founders of Konoha. He also trained Itachi. Madara helped Itachi with the Uchiha Clan Massacre.
im no sure
No, she is not in the Uchiha clan.
The special eyes of the Uchiha Clan is the Sharingan.
Yes. They are all in the Uchiha clan.
The Konoha Council and Danzo were the ones who told Itachi to kill the Uchiha clan.
uchiha clan
The Uchiha Clan
Sasuke Uchiha name tells is, its the Uchiha clan it's the one where the symbol looks like a thermometer.
Episodes 129-131 are all of Sasuke having flashbacks revealing his past, his bonds with Itachi, and eventually the Uchiha Clan Massacre.
Uchiha Madara, of course. He is one of the strongest (if not THE strongest) members of the Uchiha Clan. Since the Uchiha Clan is considered as a powerful clan, it is quite safe to say that Madara can stand up against the likes of Deidara.
Uchiha Memo or Uchiha Guillermo are the same person he is one member of the 4 novel familys he is a family member from the uchiha clan he is the only family member that has obtain the Mangekyo Sharingan he is the most important family member of the uchiha clan.