2. Chemical Elements The simplest form in which a substance exists. Cannot be broken down by a chemical reaction. The simplest form in which a substance exists. Cannot be broken down by a chemical reaction. 91 occur naturally, the rest are man made. 91 occur naturally, the rest are man made. Colors on the periodic table are determined by state at room temperature. Colors on the periodic table are determined by state at room temperature. Each is represented by a one or two-letter symbol. First letter is capitalized, second is lower case. Each is represented by a one or two-letter symbol. First letter is capitalized, second is lower case.

3. Some Elements are named after a property Au: Latin aurum – shining dawn Au: Latin aurum – shining dawn Br: Greek bromos – stench Br: Greek bromos – stench H: hydros genes – water born (water former) H: hydros genes – water born (water former)

4. Some are named after the location of discovery Indium (In) Indium (In) Francium (Fr) Francium (Fr) Germanium (Ge) Germanium (Ge) Californium (Cf) Californium (Cf) Helium (He) Helium (He)

5. Others are also named for a celestial body Tellurium (Te) Tellurium (Te) Mercury (Hg) Mercury (Hg) Uranium (U) Uranium (U)

6. Still others were named after famous scientists. Nobelium (No) Nobelium (No) Curium (Cm) Curium (Cm) Einsteinium (Es) Einsteinium (Es)

7. Names for the elements have their origins in several languages: Latin,  Olde English, even Arabic Most of the symbols we use come from the English or Latin names. Some examples of symbols derived from the Latin include: Au -goldAg -silver Cu -copperPb -lead

8. There is one symbol, however, that does not come from English or Latin. W -tungsten The W is from wolfram, the German word for tungsten. The metal is found in the mineral known as wolframite.