Bore me.

In coordination chemistry, the oxidation number of a central atom in a coordination compound is the charge that it would have if all the ligands were removed along with the electron pairs that were shared with the central atom[1] (in a coordination compound, all shared electron pairs are donated 의해 the ligands). Imagine the central atom of a molecule being stripped of all its appendages, and the intervening electrons going with the ligands, leaving the central atom 'naked.' So, for example, in water, the central atom is oxygen, and the ligands are the two hydrogens which came to the oxygen to share its electrons. In stripping, the hydrogens go away along with the two electrons they came to the oxygen for, leaving the oxygen minus 2 electrons. Thus, oxygen has an oxidation number of +2 (the absence of 2 negative charges, the electrons, is effectively equivalent to the 'presence' of 2 positive charges).

The oxidation number is used in the nomenclature of inorganic compounds. It is represented 의해 a Roman numeral; the plus sign is omitted for positive oxidation numbers. The oxidation number is placed either as a right superscript to the element symbol, e.g. FeIII, 또는 in parentheses after the name of the element, e.g. iron(III): in the latter case, there is no 우주 between the element name and the oxidation number.

The oxidation number is usually numerically equal to the oxidation state and so the terms oxidation state and oxidation number are often used interchangeably. To be 더 많이 precise, however, oxidation number is used in coordination chemistry with a slightly different meaning since the rules used for counting electrons are different: every electron belongs to the ligand, regardless of electronegativity. Also, oxidation numbers are conventionally represented with Roman numerals while oxidation states use Arabic numerals. The oxidation state can differ from the oxidation number in a few cases where the ligand atom is less electronegative than the central atom (e.g., in iridium phosphine complexes), resulting in a formal oxidation state that is different from the oxidation number.

So now that you've finished 읽기 that, solve this question:
Use half reactions to balance the equation for the reaction between ferrous (II) ion and acidified dichromate solution such that the chromic (III) ion and ferric (III) ion are part of the product. Show working.

....................................*sneezes*.................

The unit 원, 동그라미 is a 원, 동그라미 that has a radius of exactly one unit. The unit 원, 동그라미 exists on the coordinate plane, so every radius of that 원, 동그라미 has a value of one unit in any direction on the coordinate plane. Using the sine, cosine, tangent, cosecant, secant, and cotangent from Trigonometry, the degree of the central angle can be found 의해 creating a right 삼각형 using a central angle and a radius of the unit circle. In this unit circle, pi is equal to exactly 180 degrees, so the whole 원, 동그라미 is the equivalent of 2 pi. 당신 can also use these fractions of pi to solve for the measurement of the central angle of the unit circle, making the two numbers interchangable.

*talks bout global warming*.................................................................................................................................*yawns*...

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What was the 질문 again?

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THERE ARE OVER 100 ODD NUMBERS
1 3 5 7 11 13 15 17

키스 ur asshole