An element M has an atomic number 9 and atomic mass 19. Its ion will be represented by (1) M (2) M^(2+) (3) M^(-) (4) M^(2-)

An element M has an atomic number 9 and atomic mass 19. Its ion will b

1.	An element M has an atomic number 9 and atomic mass 19. Its ion will be represented by (1) M (2) M^(2+) (3) M^(-) (4) M^(2-)
Answer» Solution :Since its atomic number is 9, hence it is some halogen (e.g. F). Thus, its ION should EXIST as `M^(-)` ion as given in CHOICE (3).