Help!
Ain't no way, absolutely none!
One can tell if the safety is off, but not if a round is chambered. That said, it's always a good idea to assume that the gun is ready to fire.
The safety lever is on the (shooter's) right hand side of the weapon - up is "safe", down is "fire". The magazine clips into the bottom of the weapon and does not move until the shooter presses the latch to remove it.