A phase change is when matter changes to from one state ( solid, liquid, gas, plasma) to another.
Answer:
the answer is A hope this helps
Explanation:
nuclear fusion yields more energy than nuclear fission and the products of the reaction are not radioactive
An atom that has 13 protons and 15 neutrons is isotope of Aluminium (answer C)
<u><em>Explanation</em></u>
- Isotope is a form of the same element with the equal number of protons but difference number of neutrons in their nuclei.
- In other words isotope has the same atomic number but different mass number.
- Atomic number of a element is determined by number of protons of an element.
- from the periodic table Aluminum in atomic number 13 therefore it has 13 protons <em>therefore an atom that has 13 protons and 15 neutrons is a isotope of Aluminium. </em>
That would be cause part of the sodium is pure and that means it still kind of has it properties when it was an element and that its i think.
