# Question #7d64f

Oct 6, 2016

See explanation.

#### Explanation:

Hyphen notation is simply a way we have of naming isotopes.

In order to use hyphen notation properly, you must

• add the mass number of the isotope

Let's take, for example, $\text{^14"C}$, one of the stable isotopes of carbon, $\text{C}$. The hyphen notation for this isotope would be

carbon-14

Here you have the name of the element written first, followed by the hyphen and by the mass number, which in this case is $14$.

Another example could be $\text{^238"U}$. Here you are dealing with an isotope of uranium, $\text{U}$, which has a mass number equal to $238$. This means that its hyphen notation will be

uranium-238

Check out this video for more examples