You and your friends have been magically transported inside an 18 room castle built by the famous chemist, Dmitri Mendeleev.  Each room is entirely made from one of the elements of the first three rows of the periodic table.  No element is repeated.  Each element will appear in the state (solid, liquid, gas) it retains at room temperature.

 

You do not know where in the castle you have been transported.  A holographic image of Mendeleev will accompany you on your journey giving you clues to help you determine which room you are in.  Each time you identify the element a room is made of, you will be transported to another room.   Once you have traveled through all of the rooms, you will find your way out of the Castle Mendeleev.