CHEMISTRY HELP PLEASE!!!!!!?

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Can you tell me what to do for this problem, you don't have to answer it, I just don't know what this is or what it's asking me to do. Thanks!

Write the isotope symbol, including atomic number & mass number, for the following isotopes.
A. carbon-14 B. chromium-53 C. nickel-63 D. ziconium-92
 
You have to write the symbol for the isotope in question, as follows:

(superscripted mass number) Atomic symbol (subscripted atomic number)

Don't write the brackets, I just put them in to clarify it.

The atomic number and the symbol can be found with the aid of a periodic table. The mass number is the number given in the question.

Oxygen-18, for example, is written 18O6, where the 18 is superscripted and the 6 is subscripted.
 
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