Which observation indicates that a chemical reaction has taken place? O A substance becomes warmer.
O A material changes from a solid to liquid.
O Bubbles form when a liquid is heated.
O A new chemical substance is formed.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.