What happens to an unbeliever after death and when Judgement day comes?

The Second Resurrection – the resurrection of unbelievers

In Revelation 20: 11- 15 we read,11 Then I saw a great white throne and him who was seated on it. The earth and the heavens fled from his presence, and there was no place for them. 12 And I saw the dead, great and small, standing before the throne, and books were opened. Another book was opened, which is the book of life. The dead were judged according to what they had done as recorded in the books. 13 The sea gave up the dead that were in it, and death and Hades gave up the dead that were in them, and each person was judged according to what they had done. 14 Then death and Hades were thrown into the lake of fire. The lake of fire is the second death. 15 Anyone whose name was not found written in the book of life was thrown into the lake of fire.” 

Jesus was serious about hell. He mentioned hell more than he mentioned heaven. Read John 5:28 – 30, 28 “Do not be amazed at this, for a time is coming when all who are in their graves will hear his voice 29 and come out—those who have done what is good will rise to live, and those who have done what is evil will rise to be condemned. 30 By myself I can do nothing; I judge only as I hear, and my judgment is just, for I seek not to please myself but him who sent me.”