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Home » The number of protons in the nucleus of one atom of an element Y is 5. The symbol of the ion formed by an atom of this element will be:
The number of protons in the nucleus of one atom of an element Y is 5. The symbol of the ion formed by an atom of this element will be:
CBSE | Chemistry | Class 10 | Exercise 1 | Lakhmir Singh | Metals and Non Metals
The number of protons in the nucleus of one atom of an element Y is 5. The symbol of the ion formed by an atom of this element will be:

(a) Y3-

(b) Y2+

(c) Y2-

(d) Y3+

Solution:

Option (d) is the answer.  

Explanation: Because one atom of the element Y contains 20 protons, the number of electrons will be the same. Its ion Y2+ will have a total of 20-2= 18 electrons.

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