He didn't know he did it.
It happened when Voldemort attempted to kill Harry when he was a baby. It was quite on accident, but was a result of the spell backfiring. It was the reason that Harry could speak Parseltongue and why he and Voldemort sometimes shared a mental connection.
He wanted to become immortal.
Lord Voldemort had seven Horcruxes;The diary.Marvolo Gaunt's ring.Salazar Slytherin's locket.Helga Hufflepuff's cup.Rowena Ravenclaw's diadem.Harry Potter.Nagini.He also had part of his soul inside him.
No, as Horcruxes are a sign of a Dark Wizard. Obviously, someone had to be invented (and tested) it, but nobody was mentioned by name in any of the books.
No.
Voldemort shot the killing curse at Harry and Harry used a spell to backfire it at him. The killing curse backfired and killed Voldemort, so technically it was suicide.
Destroy the horcruxes
He wanted to become immortal.
Lord Voldemort had seven Horcruxes;The diary.Marvolo Gaunt's ring.Salazar Slytherin's locket.Helga Hufflepuff's cup.Rowena Ravenclaw's diadem.Harry Potter.Nagini.He also had part of his soul inside him.
Yes, Ron destroyed one of Lord Voldemort's Horcruxes - killing a piece of his soul.
Horcruxes: Cup, locket, ring, diadem, harry, snake, diary. He dies when Harry finally kills alll of his horcruxes and Harry gets to kill him.
Yes, Harry won and Voldemort died.
Harry didn't make Horcruxes, Voldemort did.
They had to destroy seven horcruxes. Voldemort wanted to divide his soul into seven pieces; since he himself had one of the seven pieces, that would have required only six horcruxes. However, he accidentally created one more horcrux.
Voldemort dies at the end of Harry Potter and the Deathly Hallows because all his horcruxes have been destroyed.
Lord Voldemort himself is not in The Chamber of Secrets book. Instead, there is a past version of himself, kind of like a ghost of his past, which is hidden inside one of his horcruxes.
Harry potter is looking for horcruxes to destroy them and kill lord voldemort
No, as Horcruxes are a sign of a Dark Wizard. Obviously, someone had to be invented (and tested) it, but nobody was mentioned by name in any of the books.