This diagram represents a neutral atom of fluorine-19. Which best describes the structure of fluorine-19?

A. 2 electrons in the first energy level; 7 electrons in the second energy
level

B. 2 electrons in the first energy level; 8 electrons in the second energy
level

C. 9 protons and 9 neutrons in the nucleus

D. 10 protons and 9 neutrons in the nucleus

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

what does the table look like

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.