Water ________ hydrogen and oxygen.

Water is ____________ of hydrogen and oxygen.

The non-covalent intermolecular forces described in this video behave differently. How are the forces ranked in terms of their energy? A: Van Der Waals > Ionic > Hydrogen bonds B: Ionic > Van Der Waals > Hydrogen bonds C: Ionic > Hydrogen bonds > Van Der Waals D: Hydrogen bonds > Ionic > Van Der Waals

It is known that hydrogen _____ (be) the lightest element.

Pure hydrogen does not occur naturally on Earth in large quantities, and it is locked up in enormous quantities in water, hydrocarbons, and other ______. One of the challenges of using hydrogen as a fuel comes from being able to efficiently extract hydrogen from these compounds (化合物).

Water __________ oxygen (氧) and hydrogen (氢).

Hydrogen is the most _____ element in the known Universe.

A Chemist can _the oxygen from hydrogen in water.

Around the nucleus of a hydrogen atom moves a single electron._

In hydrogen atom the angular momentum of the electron in the lowest energy state   (   )