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?

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MCQ (Single)Charge and Mass of Sub-atomic ParticlesNCERT Exemplar

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Identify the correct atomic structure of the Al³⁺ ion where n and p represent the number of neutrons and protons respectively.

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Assertion (A): The mass of canal rays is about 2000 times as that of the neutron. Reason (R): Canal rays are positively charged radiations that consist of particles having charges equal in magnitude but opposite in sign to that of the electron. They are also known as Anode rays.

Assertion-Reason