An ion M2+ contains 10 electrons and 12 neutrons. What is the atomic number and mass number of the element M?
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magnesium....Mg is the given element
angelanshu:
atomic no. 12 & massno.24.305
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The element M is (Mg) Magnesium as Mg has 12 electrons and 12 protons
Therefore Mg2+ will have 10 electrons
Now the mass of Mg is 24
Therefore number of neutrons= 24-12
= 12
So the metal M has to be Mg
Therefore Mg2+ will have 10 electrons
Now the mass of Mg is 24
Therefore number of neutrons= 24-12
= 12
So the metal M has to be Mg
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