What are the differences between heat transfer and thermodynamics?

Heat transfer is strictly the transferring heat from one body to another and is limited only to heat, thermodynamics also includes conversion to and from heat energy into another type of energy and the transfer of heat as well

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom