Find the oxidation state of each of the following

1. Se in H2SeO3
2. N in Al(NO3)3
3. H in BaH2
4. Si in Na4SiO4
5. I in NaIO4
6. O in Na2O2
7. Br in HBrO
8. N in N2O3
9. C in (NH4)2CO3
10. Si in NH4AlSiO4

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.