In Islam, we belive that all our deeds, good or bad, all our actions are recorded. On the day of judgement, it will be decided weather you go to heaven or hell. The Qur'an describes it as a small, narrow bridge that leads to heaven, but underneath the bridge lies the flames of Hell.
If we are good, we shall pass the bridge with no problems. If not, we will fall.
Christians and Jews will be treated as Muslim will. Since we all believe in the same, ONE God (Allah means, The God).