The answer is <span>Polonium-218 (84 protons).
Alpha particles consist of two protons and two neutrons. So, mass is 4 (2+2) amu </span><span>.
</span><span>When an atom of emits an alpha particle, its atomic number will be reduced by 2 and a mass number will be reduced by 4:
</span> → + .<span>
After emission of the alpha particle from Radon-222 with 86 protons, the daughter product will have the atomic number reduced by 2: 86-2 = 84 and the mass number reduced by 4: 222-4=218:
</span> → + .
<h2>Answer with Explanation </h2>
I have been as of late pondering, on the off chance that I take a sufficiently incredible vitality source (photon) and I have an ideal mirror precisely before it and expect a "producer" shot the light towards the mirror. As impeccable mirrors assimilate no vitality of ANY sort from photons, should this imply the ideal mirrors could never move because of exchange of force of the light? it depends on the mass of the mirror, obviously. Your ideal mirror would have a vast mass, in which case it could assimilate the force change, without engrossing any vitality. A reflection of limited mass will ingest some vitality in a crash that will change the vitality and along these lines the wavelength of the photon. There is no logical inconsistency here.
Answer:
Biologically diverse communities are also more likely to contain species that confer resilience to that ecosystem because as a community accumulates species, there is a higher chance of any one of them having traits that enable them to adapt to a changing environment.
Explanation:
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Answer
Cardiac and smooth muscles
Explanation:
The answer is C. Fights off foreign invader
