My chemistry teacher told that an atom has infinite energy shells according to Bohr model , where electron reside according to its angular momentum and energy.
But in lower classes/ grades I have learned that when we give excess energy to atom, the atom loses electron.
But now they are saying that when electron gain energy it move on to higher energy level.
So in this way, an electron should never 'jumps out'(sorry for that word) of atom? And keep going to higher energy levels as atom has infinite energy levels?
And should always be bound with the atom and never lost.
However electrons do actually leave atoms when given excess heat.
So how does atom lose electron and not always being bind with atom when given excess heat in spite of infinite energy levels?
What does my teacher actually mean by saying it?