Name of element – mass # Ex. Potassium – 40 This would be an atom of potassium with a mass number of 40 19 protons (because the atomic # is always 19 for potassium) 21 neutrons (40-19 = 21) Mass #Symbol Ex. 40K Note: Nuclear notation can also include the atomic # below the mass #, but this isn’t essential since the identity of the element allows you to determine the atomic #. Mass #Symbol Atomic #

Sure! Let’s break down the example of potassium and apply it to another element for clarity.

Let’s take Carbon as an example.

1. Name of Element – Mass #: Carbon – 12

– This represents an atom of carbon with a mass number of 12.
– Carbon has an atomic number of 6 (which means it has 6 protons).

2. Calculating Neutrons:

– Neutrons = Mass number – Atomic number

– Neutrons = 12 – 6 = 6

3. Mass # Symbol:

– This can be written in nuclear notation as:

– 12C

To summarize for Carbon:

– Mass # Symbol: 12C

– Atomic #: 6

This notation means that this carbon atom has a mass number of 12 with 6 protons and 6 neutrons.

Feel free to ask about another element or if you have further questions!