Compounds are pure substances made of different kinds of atoms chemically bonded together. Briefly discuss the difference between an element and a compound. An element is a pure substance and it's made on only kind of atom. A compound is a pure substance made of two or more elements that are combined chemically.
<span>Fe(NO3)2
The NO3 part is a poly-atomic ion with total charge -1.
This is because Fe has a +2 charge and two NO3's with a -1 charge will balance out to 0.
Most often we just make the assumption that Oxygen has a -2 oxidation number because it is very electro-negative.
So to find N, we just need an oxidation number that balances out with 3(-2) to get -1 (the total charge of the ion)</span>
Answer:
Explanation:
Fe2+ Has 4 unpaired electrons.
By method of elimination;
Option A: Ni2+ has two unpaired electrons. so this option is wrong.
Option B: There are 5 unpaired electrons in the Fe3+ ion. so this option is wrong.
Option C: There are 4 unpaired electrons in the Cr2+ ion. so this option is correct.
Option D: There are 5 unpaired electrons in the Mn2+ ion. so this option is wrong.
Option E: There are 3 unpaired electrons in the Co2+ ion. so this option is wrong.
Hexanoyl Chloride on treatment with excess
Ethyl Magnesium Bromide yields
tertiary Alcohol. In this reaction Hexanoyl chloride is first converted into
intermediate ketone (Octane-3-one), secondly the ketone formed is further reduced to <em>
tert.</em>
Alcohol (3-Ethyloctan-3-ol), The reaction along with mechanism is shown below,
Visible light is the wave and it has 10^-6