The number of protons in one atom of an element X is 8. What will be the number of electrons in its ion x^2-?

58 One of the following compounds is not ionic in nature. This compound is: 58 The rechargeable battery used in a mobile phone hand set is usually: 61 If the number of protons in one atom of an element Y is 20, then the number of electrons in its ion Y²⁺ will be: 62 The noble gas having only two electrons in its valence shell is: