Which region contains elements with five valence electrons ?

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?

Stage in which a typical star has completely stopped fusion

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?