Question

Molecules of hydrogen escape from earth, but molecules of oxygen and nitrogen are held to the surface and remain in the atmosphere. explain.

Answer 1

Hydrogen is a light molecule

Step-by-step explanation:

The molecular weight of a gas determines its molecular speed. Hydrogen is a very light gas, far lighter than oxygen or nitrogen. These heavier gases cannot escape the earth because of their molecular weight but hydrogen does escape the earth surface because it is very light molecule having very high molecular speed.

Answer 2

Hydrogen escape from Earth because he is ligher than molecules of nitrogen and oxygen. Hydrogen move faster and can escape Earth's gravitational force.
One mole of molecule of hydrogen (H₂) has molecular mass 2 g/mol, molecule of nitrogen (N₂) has molecular mass 28 g/mol and oxygen (O₂) has 32 g/mol.