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What is the relationship between two element X and Y whose atomic numbers are 18 and 20 but their mass number remains same as 40?
Wiki User
∙ 12y ago
There is no relationship other than having the same mass number. Element X has an atomic number of 18, which makes it the noble gas argon. The particular isotope is argon-40, which means that the atomic nuclei of this isotope of argon contain 18 protons and 22 neutrons. Element Y has an atomic number of 20, which makes it the alkaline earth metal calcium. The particular isotope is calcium-40, which means the atomic nuclei of this isotope of calcium contain 20 protons and 20 neutrons.
Wiki User
∙ 12y ago
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