There are several hundred scientific symbols. Every element has a symbol, each sub-atomic particle has a symbol, there are symbols for the sun, moon and the planets and lots of other entities. Then there are symbols for measurement units. Also for various constants in mathematics or physics such as pi or e, the speed of light (in vacuum) c, Planck's constant h, gravitational constant G, Avogrado's number and so on and on.
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A notation is a system of written symbols used to represent numbers, amounts, or elements in something such as music or math. So scientific notation is the system used by scientists to simplify large numbers. And there isn't just scientific notation there's also stuff like electrical notation or musical notation. Hope this helps!
Unfortunately, limitations of the browser used by Answers.com means that we cannot see most symbols. It is therefore impossible to give a proper answer to your question. Please resubmit your question spelling out the symbols as "plus", "minus", "equals" etc. Also use ^ to indicate powers (eg x-squared = x^2). There is no operator between the two numbers in scientific notation.
There are no symbols on the penny.
There are no symbols, only characters.
There are no symbols. Just spelling them.