Question

I have seriously no clue! Please help!

Answer 1

The elements are identified by the number of protons of the atom, which is its atomic number.

In this case the number of protons 39 (atomic number 39) permit you to identify the element as gallium.

Now, to identify the isotope you tell the name of the element and add the mass number.

The mass number is the sum of the protons and the neutrons.

In this case, the number of neutrons is the original 39 plus the 2 added suddenly, i.e. 39 + 2 = 41, so the mass number is 31 + 41 = 72

Therefore, the isotope is gallium - 72.

Answer: isotope gallium - 72

Answer 2

The elements are identified by the number of protons of the atom, which is its atomic number.

The atomic number is above the symbol of the element.

The symbol is in the middle of the "box"

Now you use the name of the element, protons, and neutrons

The mass number is the sum of the protons and the neutrons.

So now you add the neutrons and the protons

So, the Isotope is Gallium - 72.

Your answer is Isotope Gallium 72

Hope this helps