An element's most stable ion forms an ionic compound with chlorine having the formula XCl2. If the mass number of the ion is 24 and it has 10 electrons, what is the element and how many neutrons does it have?
A) Mg, 12 neutrons
B) Ne, 16 neutrons
C) O, 16 neutrons
D) Ne, 14 neutrons
E) Na, 11 neutrons
Correct Answer:
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