I believe it’s a because something cannot move unless a force is acted upon it
Answer:
divide the # of molecules by avogadros number and get 3.48 x 10^-6
Explanation:
Answer: I think the answer is C)
Explanation:
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.
The particles that combined in the middle of the structure best describes neutron as neutron is always present in the middle of atomic structure