Answer:
dbdbdbdjdbdjdb zbdjdjdjdirfjfjrjdudhdhdhd
I know for certain, that chloroplast does not belong on that list, chloroplast only belongs inside of plant cells to produce energy required for the plant. I am not sure about the era or er, but chloroplast does not belong.
Hope this helps, if not, comment below please!
Answer:
228
Explanation:
alpha decay is removing alpha particle ![_2^{4}He](https://tex.z-dn.net/?f=_2%5E%7B4%7DHe)
2 number of protons, 4 mass number = 2 protons + 2 neutrons
We have
90 protons and 142 neutrons
<u> - 2 protons - 2 neutrons</u>
88 protons 140 neutrons
Mass number of new (daughter) atom = 88 +140 = 228