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B is the element symbol for boron. What does the notation 11/5 B tell you? How many neutrons does this isotope have?

See explanation

Explanation:

11/5 represents the mass number and the number of protons that boron has. 11 means that the total mass number, or the combined number of protons and neutrons is 11, while the 5 represents the number of protons. This means that the isotope must have 11-5=6 neutrons. Hope this helps!

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:

there is none because earth is stationary and flat.