How do the hydrogen-1 and hydrogen-2 isotopes differ? A. Hydrogen-2 has one neutron and hydrogen-1 has no neutrons

B. Hydrogen-2 has two protons and hydrogen-1 has one proton

C. Hydrogen-2 has one more electron than hydrogen-1

D. Hydrogen-2 has 2 neutrons and hydrogen-1 has one neutron

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.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter