How do you know how many electrons is in each orbital and in each orbital subshell?
when you were in GCSE you should have been taught that the electron shells went 2-8-18-32. -the s orbital can hold 2 electrons, so that is the first shell filled -next is the p orbital that can hold 6 electrons, that’s the second shell filled -to fill the third shell you need 10 more electrons that is where the d orbital comes in, that can hold 10 electrons. -the fourth shell needs an additional 14 electrons that is where you get the f orbital, if your doing A level you don’t need this my chem teacher said to just forget about the f orbital its too complicated and you don’t need it. im doing my A level at the moment and this is how my teacher told us it seemed pretty straight forward how she explained it.