Actually we have a pretty good grasp of what gravity is in terms of the geometry of spacetime. There are acknowledged issues regarding how it all fits into a quantum mechanical framework, but you model provides no insight there either.

Anyway, you attempt to explain gravity in terms of magnetism. As you do not seem able to explain what magnetism is, then you have achieved nothing. This is particularly true as you do not appear to understand magnetism beyond the gross level of general attractions and repulsions, i.e. you do not seem to be aware of the quantitative behaviour of magnetic systems.

By the way, we are still awaiting your answers to why "mercury has 55% character of A and 45% character of B atom". (As well as the rest of the unanswered questions.)