Circle the atom in each pair that has greater ionization energy. Li or Be
Ca or Ba
Na or K
P or Ar
Cl or Si
Li or K

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:

gas and precipitate r the correct answers