7
What is the name of this isotope?
Periodic Table link
P: 36
N: 48

Because the number of neutrons is different, the mass number is different. Isotopes are written in two different ways. They can be written using their symbol with the mass number (to the upper left) and atomic number (to the lower left) or the isotope name is written with a dash and the mass number

Explanation:

I don't know the answer but I am sure this will help you out.

first one is the correct answer

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )