Question:
What will happen to those who die, who never had the chance to hear about Christ?

Answer:

“The invisible things of [God] from the creation of the world are clearly seen, being understood by the things that are made, even His eternal power and Godhead; so that they are without excuse” (Romans 1:20).

God the Father is the giver of salvation. To reject the testimony in creation causes people to set up idols, and God will then give them up to unclean things (see Romans 1:21-25).

Abraham believed God, and though he lived long before Jesus was here, Jesus was revealed to him by his faith. Jesus said: “Your father Abraham rejoiced to see my day: and he saw it, and was glad” (John 8:56).

Luke 16:19-33 shows that no one can be saved after they die.

Also, 2 Thessalonians 2:1-12 shows that anyone who has heard the gospel and refused it will not have another chance after the rapture of the church.

“And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of His coming: even him, whose coming is after the working of Satan with all power and signs and lying wonders, and with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved. And for this cause God shall send them strong delusion, that they should believe a lie: that they all might be damned who believed not the truth, but had pleasure in unrighteousness” (2 Thessalonians 2:8-12).