Was shaitaan an angel who had disobeyed Allah's command?

Answer

Shaitaan was not an Angel. The

Qur'aan states very clearly that he is a jinn. Verse 50 of Surah Al-Kahaf in the 15th Juz states: "And remember when We said to the Angels: 'Prostrate for Aadam", then all prostrated except Iblees, and he is from the jinn, thus he rebelled against the command of His Rabb."