What is the isotope notation for a nucleus with 36 protons and 69 nucleons?

Question

As
36
69


Se
36
69


Br
36
69


Kr
36
69

Answer 1

To write the isotope notation, we can identify the element based on the number of protons (which is the atomic number) and then use the total number of nucleons (which is the mass number).

• The element with 36 protons is Krypton (Kr), as the number of protons (atomic number) corresponds to the element symbol.
• The mass number (total nucleons) is given as 69.

The isotope notation is written as:

\[ _{36}^{69}\text{Kr} \]

So, the correct isotope notation for a nucleus with 36 protons and 69 nucleons is:

Kr \[ _{36}^{69} \]