List the 3 particles of an atom (w/their symbol & charge)

Protonp      +1

Neutronn       0

Electrone-      -1

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

the dissolution of polymer can be thermodynamically described in 2 steps.