If the atomic number of an element is 6 and its mass number is 4 how many neutrons are contained in the nucleus? a. 14 b. 6 c. 8 d. 20

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: