Why boiling points are much More extreme that melting points?

Every substance has its own melting point and boiling point . The stronger the forces between particles, the higher its melting and boiling points. For example, the forces between ions in an ionic solid are stronger than those between molecules in water or hydrogen.

Explanation:

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:

elements make up everything, and they combine to make compounds.

the answer is c