DAY OF JUDGEMENT (YAWM AL QIYAMAH)
Belief in the Day of Judgment is considered as a fundamental tenet of faith in Islam. Every human, whether Muslim or Non-Muslim, will die and be resurrected, be held accountable for their deeds and be judged by Allah Almighty accordingly.
During Divine judgment, it is believed that each person's Book of Deeds, in which "every small and great thing is recorded", will be opened. Throughout the judgment, the underlying principle is complete and perfect justice administered by Allah Almighty. Accounts of the judgment are also replete with the emphasis that Allah is merciful and forgiving, and that mercy and forgiveness will be granted on that day. Anyhow whoever did not accept Allah Almighty and his beloved Prophet (Peace and blessings be upon him) in his lifetime and those who worshiped other than Allah Almighty will be sent to the Hell.
Since Allah Almighty says in Al Quran :
"Surely, Allah does not forgive setting up of partners with Him, and He forgives (any other sin) lesser in degree for whom He wills. And whoever sets up partners with Allah certainly fabricates a horrible sin"
Chapter : 4, Verse :48
Further Allah Almighty says in Al Quran that even the smallest acts of the believers will not be wasted.
"So whoever does an atom’s weight of good shall see it
and whoever does an atom’s weight of evil shall see it."
Chapter : 99, Verse : 7-8