The three of them have the same amount of electrons, so we can’t determine the right one on that ground. As you might know, Pauli said that electrons are always in the position of the lowest energy. So the first situation is impossible because there is a free place available that takes less energy. Then the 3rd situation is nor possible because if one electron has a different spin than the others, there is a magnetic obstruction that be prevented if the spin changes. This means that the second situation is the right one.
Answer:
I think third one is the right answer
Explanation:
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Answer and Explanation:
(a) 
: its chemical name is sodium sulfate in which sodium is present as 
and sulfate is present as 
(b) 
: Its chemical name is copper nitrate which is a inorganic compound which is mostly crystalline in nature
(c)
: Its chemical name is iron carbonate or ferric carbonate
Then you will multiply the number of moles by 6.022×1023formula units/mol . To determine the molar mass of a compound, add the atomic weight on the periodic table in g/mol times each element's subscript. Since the formula unit CaO has no subscripts, they are understood to be 1
Color because rust and melting is a chemical property since it changes form
