Answer:
(i) Na has three shells K, L and M but here only 2 shell are given. Further L shell cannot have more than 8 electrons but here 9 electrons are given. (ii) The correct structure is (iii) As Na has 1 valence electrons, thus it has a valency of +1 and chlorine has a valency of-1 Hence, the formula of its chloride is AC1. (a) Nucleus (b) Oxygen and calcium (c)
Element | Atomic number | Proton | Electron | Neutron | Mass number |
A B C | 17 14 9 | 17 14 9 | 17 14 9 | 18 14 19-9=10 | 17+18=35 14+14=28 19 |
Particles | Atomic number | Mass number |
A B C D | 3 9 8 9 | 3 = 4 =7 9 + 8 = 17 8 + 8 = 16 8 + 10 = 18 |
You need to login to perform this action.
You will be redirected in
3 sec