1992 (2024) - Movie Review

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SOLVED: Radium- 226 is a common isotope on Earth, but it has a half-life of about 1600 years. Given that the Earth is some 5 billion years old, why is there any radium left at all?

SOLVED: When radium-226 decays, it becomes radon-222 by ejecting analpha particle - two protons and two neutrons (a heliumnucleus).a. Complete a qualitative momentum conservation diagram for theradioactive decay of radium-226. (Recall from chemistry that theisotopic number of an element is related to its mass.)b. Momentum conservation equation:c. How many times larger will the final velocity of the alphaparticle be compared to the final velocity of the radon-222?

Tell us: What’s your favorite book of 2022? - The Boston Globe