Asubstance which is made up of identical atoms is a(n):
chemical
element
compound
alloy

The correct answer its:

Elements

hope it helps

can I get the brainliest please?

false

because it does not have the potential to be entirely used up

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.