The atomic number of an element X is 19. The number of electrons in its ion X⁺ will be:

45 State whether magnesium chloride will conduct electricity or not. Give reason for your answer. 45 Why are covalent compounds generally poor conductors of electricity? 47 The atomic number of an element Y is 17. The number of electrons in its ion y^- will be : 48 The atomic numbers of four elements A, B, C and D are 6, 8, 10 and 12 respectively. The two elements which can react to form ionic bonds (or ionic compound) are: