Ici has a higher boiling point then br. what is the best explanation for this?

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:

is there any options? maybe im just not seeing them but i need the options to

-love shrooms