An atom of an element has 28 innermost electrons and 7 outermost electrons. in which period of the periodic table is this element located?

1. 5

2. 2

3. 3

4. 4

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:

the temperature of the gas, in k, not celsius.