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1. The ion of an element has \(3\) positive charges. Mass number of the atom is \(27\) and the number of neutrons is \(14\). What is the number of electrons in the ion?
2. Identify the \(Mg^{2+}\) ion from the Figure where, n and p represent the number of neutrons and protons, respectively.
3.
In a sample of ethyl ethanoate (\(CH_3COOC_2H_5\)), the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?
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