Between iron and
osmium

Classify each statement about effective nuclear charge, zeff, as true or false.

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?

Can someone me with 3 and 4 plz. this is for masteries test.