The ion with 3+ charge 28 electons and a mass number of 71

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

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?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?