u probably know that all staff is made up of atoms and atom is a really really tiny partical. every atom has a core which is made up of at least one positive charged partical called proton. and in most cases, some number of the neutral particals called neutrons. that core is surrounded by negative charged particals electrond. the identity of an atom is determined only by the number of protons in nucleus. H2 is h2 because it has 2protons. carbon is carbon because it has 6. gold is gold because it has 79and so on. in duge means a momentary tention. how do we know about atomuc structure.we cant see neutron electron and nucleus. so we do a,,,,,,,,,modules and develop what we think is there. then we do more experiments to see if its agree with the module. if they do, great. if they don't, it might be time for a new module.we have lots of very different modules for atoms since ,,,,from 400 bc and there will almost certainty for many more become. ok ..... over. the cores of the cores tend to stay together but electrons prefers to move.01.22。and this is why chemists love electrons. if we could marry them, we probably would. but electrons are aware of they appear to behave either as particals like lityle baseballs or as waves like water waves. depending on the experiment that we perform. one of the weired thing about electrons is that we cant xxxxxx see where they are. its not we dont have equipment.it's that the uncertainty is a part of model of the electrons. so we cant pinpoint them. fine. but we cant say there is a certain probability of finding an electrons in the given space around nuclears. and that means we can ask the following questions. if we draw a shape around the nuclears such as we would be 95% sure of finding a given electrons within that shape. what would it like？here are few these shapes. chemists call them orbitals. and what each one looks like depends on among other things. how much energy it has. the more energy an orbital has, the further most of the distance from the nuclears0225