All the atoms in Neon do not have to have 10 protons. True, or false?

False.

Explanation:

The number of protons in an atom also places it on the periodic table- the 1st element on the periodic table is Hydrogen because it has 1 proton. If it had 2- it'd be Helium. Neon must have 10 protons to be #10 on the periodic table. (and to even be Neon)

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.