The massive number of an atom is 31. The M shell of this atom countain 5 electrons
a) write the electronic configuration of the atom.?
b) What is the atomic number of this atom.?
c) How many neutrons doesn't this atom have?
d) Draw the Bohr models of the atom?
Answers
Answer:
I don't know weather it is correct or not
Explanation:
In 1898, J. J. Thomson proposed the first of many atomic models to come. He proposed that an atom is shaped like a sphere with a radius of approximately 10-10m, where the positive charge is uniformly distributed. The electrons are embedded in this sphere so as to give the most stable electrostatic arrangement.
Thomsons’ atomic model [Source: Wikimedia Commons]
Doesn’t the figure above remind you of a cut watermelon with seeds inside? Or, you can also think of it as a pudding with the electrons being the plum or the raisins in the pudding. Therefore, this model is also referred to as the watermelon model, the plum pudding model or the raisin pudding model.
An important aspect of this model is that it assumes that the mass of the atom is uniformly distributed over the atom. Thomson’s atomic model was successful in explaining the overall neutrality of the atom. However, its propositions were not consistent with the results of later experiments. In 1906, J. J. Thomson was awarded the Nobel Prize in physics for his theories and experiments on electricity conduction by gases.