The oxidation number of an element is the number of electrons that are gained or lost by the element to form a chemical bond.
the net oxidation number of the ion is its charge.
compound (NH₄)₂Cr₂O₇ is made of cation - NH₄⁺ and anion - Cr₂O₇²⁻
oxidation number of ion - -2
(oxidation number of Cr x 2 Cr atoms) +(oxidation number of O x 7 O atoms )= -2
oxidation number of Cr = y
oxidation number of O = -2
(y x 2) + (-2 x 7) = -2
2y - 14 = -2
2y = 12
y = + 6
therefore oxidation number of Cr is +6
The answer is b because 46-44 = positive 2.
<span>Answer:
Cubane, C8H8
It "sorta" looks like this.
....H.........H
......\......../
H.....C - C
...\../.|.../.|
....C - C.C- H
.... |.....|./
....C - C
.../.........\
H............H
Imagine a cube of carbon atoms, with a single hydrogen attached at each of the 8 corners. That way we have complete symmetry, since all of the bonds, carbons and hydrogens have the identical environment.</span>
The optical density of a medium is not the same as its physical density. ... The more optically dense that a material is, the slower that a wave will move through the material<span>. ...</span>
