Louis was investigating physical and chemical changes in matter. Which of these changes that Louis found involves a chemical change in matter? Melting of ice
Grinding of rock
Evaporation of water
Rusting of iron

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

4d^55s^1 ( third choice)

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.