Answer:
James Chadwick
Explanation:
In his first experiment, Rutherford was unable to predict the total mass of nucleus. He noticed that if only electrons and protons are present in the nucleus then by adding their masses, it falls short of the net mass of the atom. so he concluded that there must be another particle and that Particle was later discovered by James Chadwick in 1932.
Answer: The balanced equation is
Explanation:
The given reaction equation is as follows.
Here, number of atoms present on reactant side are as follows.
Number of atoms on product side are as follows.
To balance this equation, multiply by 2 and MgO by 3 on reactant side. Also, multiply by 3 on product side. Therefore, the equation can be rewritten as follows.
Hence, number of atoms on reactant side are as follows.
Number of atoms on product side are as follows.
Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.
Thus, we can conclude that the balanced equation is .
Answer:
it can hold up to 12 electrons.
explanation:
the p sub levels have 6 elements each, they each hold 2 electrons, so the entire p sub levels have 12 electrons.
Answer:
Because each atomic number is unique.
Explanation:
Atomic number = No. of protons in an element
Each atomic number in each element is unique and that makes it easier to distinguish it between several elements.