Sodium(na) is a highly reactive metal and chlorine is a poisonous gas. which compound do they form when they chemically combine?

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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:

14,16 18 reacts with group

the dependant variable is spilled water

the independent is the heat