What else is necessary in order for a hydrogen atom in a molecule to participate in a hydrogen bond?

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Which element is the least metallic between cadmium, silver, zinc, or iron?