Sn is Tin. and the suffix for Chlorine is nearly always Chloride. The (II) means the Tin [in a hypothetical situation where the compound was purely ionic] has an oxidation state of 2, or +2, (ie deficient of two electrons). Source: A2 Chemistry Student.
The chariot was built of pieces of wood which had been bent into the required shape possibly by immersing them in boiling hot water for several hours, bending them and then letting them dry. Various kinds of wood were used: elm, ash for the axles and sycamore for the foot board. The Egyptians knew two types of chariots.
One way where societies build + maintain empires is by establishing systems of communication + transportation. The Royal Road built by rulers of Persian Empire connected Susa in Persia to Sardis in Anatolia. 4 horse chariot dates from 6th-4th centuries B.C. Type of vehicle that would have traveled Royal Road in time of Darius.