In an online diary entry, Rowling described a Horcrux as a "receptacle in which a Dark wizard has hidden a part of his soul for the purposes of attaining immortality." The wizard becomes immortal so long as the Horcrux remains intact.
To make a Horcrux, the person must commit a murder to place a fraction of their soul into a different object, so even if they are killed, the parts of their soul still live on, so they can't fully be gone unless all Horcruxes are destroyed.
The retrieval and destruction of Lord Voldemort's Horcruxes forms the main focus of the final two books in the series, Harry Potter and the Half-Blood Prince and Harry Potter and the Deathly Hallows.
The following are the details of the destruction of Voldemort's 7 Horcruxes:
No, he didn't die because he was Horcrux. Had he not been a Horcrux the killing curse would have killed Harry, instead of just the Horcrux.
There is no eighth horcrux, as Voldemort only created seven.
Nagini the snake was the last Horcrux to be be created and destroyed.
No she didnt....Dumbledore tells Harry that he is a Horcrux
A horcrux is created when a witch or wizard rips off a piece of their soul and embeds it in an object. The horcrux will allow them to survive even if their mortal body should die.
By creature do you mean Horcrux? If so, it's because he is a Horcrux. Although, this didn't happen in the book.
I guess you mean "Voldemort"? That's because Voldemort tried to kill Harry, but when he did, he actually made a Horcrux. Harry is the horcrux, but he is Harry as well. The Horcrux inside Harry gets killed in the last book.
No, he didn't die because he was Horcrux. Had he not been a Horcrux the killing curse would have killed Harry, instead of just the Horcrux.
The reason he's an unintended horcrux is because the night he tried to kill Harry, he put a piece of his soul inside him(how you make a horcrux). He didn't mean to, though.
There is no eighth horcrux, as Voldemort only created seven.
Nagini the snake was the last Horcrux to be be created and destroyed.
Yes, the horcrux inside of Harry Potter
First off, I think you mean horcrux, and it was the locket.
No, but the diary Horcrux, was destroyed.
No she didnt....Dumbledore tells Harry that he is a Horcrux
if you mean the 7th horcrux, well it was harry Potter hope this helps
J.K. Rowling never revealed the process in making a Horcrux.