The atomic number of an element E is 16. The number of electrons in its ion E2− will be:
The atomic number of an element Y is 17. The number of electrons in its ion Y− will be (a) 17 (b) 18 (c) 19 (d) 20
The atomic number of an elelment X is 19. The number of electrons in its ion X' will be: (a) 18 (b) 19 (c) 20 (d) 21