(a) If ‘X’ contains 6 electrons in ‘M’ shell as valence electrons, then the electronic configuration of ‘X’ is K = 2, L = 8, M = 6
∴ Atomic number = 16
(b) ‘X’ is a non-metal.
(a) If ‘X’ contains 6 electrons in ‘M’ shell as valence electrons, then the electronic configuration of ‘X’ is K = 2, L = 8, M = 6
∴ Atomic number = 16
(b) ‘X’ is a non-metal.
Elements | Protons | Electrons | Neutrons | Atomic Number | Mass Number |
A | – | – | 10 | 8 | – |
B | 15 | – | – | – | 31 |
C | 1 | – | – | – | 3 |
D | – | 11 | 12 | – | – |
X | Y | |
Protons | 8 | 8 |
Neutrons | 8 | 10 |