No. The good angels do not sin at all, they always do what is right.
The fallen angels do. (The ones that followed Lucifer known as Satan)
The good angels are all angels that have not fallen.
A demon is a jinn. Jinn are made of smokeless fire (plasma), they have freedom to pick sin if they please. Angels do not have freedom to sin, they happily worship and follow God. The angels were made out of Light.
Yes, the Bible gives several accounts of angels sinning, i.e. Lucifer and his fall from Heaven because of his pride and greed.
The Father gave angels and mankind free will.
They had free will until the fall. The ones who went with Satan (a third of them) are now damned forever. The ones who stood with the Lord are now sanctified, and can sin no more. It will be the same with us. Once we go to be with the Lord we will no longer sin, because we will think as he does.
A Archangel would be called a saint because they are high-ranking angels in heaven, and since they are angels, they do not sin, so they would be a saint.
no, but good angels can protect you from the bad angels(who are now demons)
There are two types of angels in the bible. They are the good angels and the fallen angels.
yes there is sometimes a good reason for people to sin
The keyword to know that doing good is right and not doing it is sin is "conscience."
because they are created by god so they are already saved According to most religions, aren't we all created by God? If so, why must we then ask to be saved or follow some sort of religion to get into heaven if being created by God means we're already saved? According to most Christian religions, angels are servants without free will and therefore are not capable of sin. People were given the gift of free will and are prone to sin. Personally, I like sin so I guess it's a good thing that I'm not a believer.