The number of protons in the nucleus of one atom of an element Y is 5. The symbol of ion formed by an atom of this element will be:

53 The electrons present in the valence shell of a noble gas atom can be : 54 The atomic number of an element X is 16. The symbol of ion formed by an atom of this element will be : 56 Out of KCl, HCl, CCl₄ and NaCl, the compounds which are not ionic are: 57 Element X reacts with element Y to form a compound Z. During the formation of compound Z, atoms of X lose one electron each whereas atoms of Y gain one electron each. Which of the following property is not shown by compound Z?