Electrons is located outside the nucleus
Answer:
No One is going to answer all this because it hard to type it all in her. its easy to search it up
Explanation:
Answer:
C
Explanation:
It's used to mesure energy used in ectothermic and endothermic reaction s
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
