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Maximus VonRueden

Feb 20, 2025

What element results if two protons and two neutrons are ejected from a radium nucleus?

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Kendrick Lakin

Feb 20, 2025

The result is Radon-222, Rn-222. You start off with Radium, Ra, which consulting the periodic table has 88 protons (it’s element #88, which is the number of protons). This is assumed to be Ra-226 (the mass number of Ra is about 226). This means that Ra-226 has 226 (mass) – 88 (number of protons) = 138 neutrons. So, if Ra-226 loses its 2 protons, it becomes element # 86, which is Rn. It also lost 2 neutrons, so it goes from 138 neutrons to 136 neutrons. Adding 136 (# of neutrons) + 86 (# of protons) you get 222, which is the mass of the Rn atom. So, Rn-222.Hope that helps!... Show More
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K
Kendrick Lakin

Feb 20, 2025

Ra has atomic number 88, so it has 88 protons. If it loses 2 protons, the new element would have 86 protons. The loss of neutrons does not change the kind of element, just the mass.The new element is Radon, Rn, atomic number 86.... Show More
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