Complex sentence: The same word was also used for the substance amber, likely because of the pale yellow colour of certain varieties, and it is from amber's electrostatic properties that the modern English words "electron" and "electricity" are derived.
Split into simpler sentences: The same word was also used for the substance amber, likely because of the pale yellow colour of certain varieties. It is from amber's electrostatic properties that the modern English words "electron" and "electricity" are derived.