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You think probable to ionosphere.
If you can enumerate the outcome space into equally likely events, then it is the number of outcomes that are favourable (in which the event occurs) divided by the total number of outcomes.
First decide whether the event space is discrete or continuous.For a discrete event space, for each outcome in the space assign a probability: a number in the interval [0, 1] such that the sum of probabilities for all outcomes is 1. The mapping from the event space to the probabilities is the probability distribution function.The procedure for a continuous event space is analogous: the sum is replaced by the integral.
It is the space consisting of all possible outcomes of the experiment.
Discrete probability. It helps if the all the outcomes in the sample space are equally probable but that is not a necessity.
Electron Cloud
You think probable to ionosphere.
That depends on how it's drawn. It may give some idea of the probability of finding an electron in a given location, or it may just show the region of space where the electron is likely to be found. If it looks like a bunch of individual dots, the density of the dots gives some indication of the probability (the closer together the dots are in a region, the higher the probability of finding the electron in that region). If it looks like a solid object (or a collection of solid objects), it's just the region(s) where the probability is over some value.
These are sometimes called 'electron clouds'.
A cloud of electrons orbit an atom and its nucleus.
This is the electron cloud.
The electron cloud is a volume of space around an atomic nucleus. It comprises of a space of probability. It is the volume of space where electrons can "probably" be found, or have a probability of being found.
the heisenburg uncertainty priciple says that you cannot know an electron's location and speed at the same time
Let me preface this by saying I don't know what answer your teacher expects. All I know is the right answer. So you might want to check your textbook before handing this in, is all I'm saying. An orbital is a probability density function that, effectively, describes the probability of the electron being in a given region of space at a particular time. It's the integral of psi times psi*, where psi is the Hamiltonian, normalized so that the integral over all space comes out to be 1 (the electron has to be SOMEWHERE in all space, so the probability of finding it there must be one).
Perhaps seeing electron in movement gives better understanding how it looks:http://www.msnbc.msn.com/id/23336318/key words for search engines: Electron filmed in motion
The region surrounding the nucleus in which electrons with certain energy move is called the orbital. It refers to a bit of space where there is a 95% chance of finding an electron.
Orbital describes space where electron is found. it provides probability for the presence of electron.