7. An exothermic reaction
8. The bonds are forming
Answer:
sorry i'm not a scientist but i think it's C
Explanation:
sorry again if i get it wrong for u :(
The answer is b. radon-222. The alpha decay means that it will emit an alpha particle when decays. The alpha particle has two protons and two neutrons. So Radium(88) minus two protons will become Radon(86). And the atomic mass will become 226-4=222.
Hope this might help ask me if u have any doubts
The electronic configuration is for iron (Fe) because if you add all those power up it will give you 26 and it’s the atomic number of Fe
