are those who have never heard about Christ going to hell?

Of course not, people who have never heard of Christ don't go to Hell. They can't help this. The people who have heard of Christ and live in sin without regret, they would be the ones in trouble. If it is really a Hell , I don't know. Personally I think Hell is here on earth. Sometimes it can be a Heaven too.

for me does people never heard about Christ he is not for hell because he/she didn't know who is Jesus Christ his life. believer knows the word of God has an accountable to spread out the good news because it is the reason why God called him/her in order that his words must be share all over the world because God love us so much He want us to heaven.i can judge if you don't share what you've heard about Jesus Christ specially salvation you will be blame.

yes you are correct, those who have heard will be accountable to spread the message that one must repent and accept Christ as their Lord and Savior to enter the kingdom of God. but this people can not be blame if a person goes to hell as it depends if they have shared the words but the person being shared to does not want to repent and accept Christ. in Mathew 28:18-19 is the Great commission of God to us. And being a christian like i am i will spread this words as this is a sign of my obedience to my Father in heaven which is why in any chance i get i will share the word.

I don't think so. It would contradict the nature of God, which is good, as the Bible itself claims so. If a baby was born to a non-christian family, I think it's not the baby's fault that he wouldn't be raised in a church and be taught about the christian God. I believe that God has a separate plan for those people (non-Christians I mean). And perhaps I'm not in the position to question Him that for now, or maybe in time we'll all know the answers to these questions but for now, we'll just have to wait and keep up the faith.