Recent content by Haunted Physt

But isn't it like Oxygen has various other oxidation state too? Its always easy to find an oxidation number with oxygen or hydrogen in it, right? But how do we come to know what Oxygen will have from -1,-2, or +1, +2? Hydrogen too accounts for -1 and +1 ... when Hydrogen reacts with a metal, it...

Well, I actually meant within seconds, but you are true. So any tips to working on Mental Arithmatic? Its really weak if I see that way...my Maths is to be improved!

Well, well, well, I am currently going to have Chemistry exams in a few days. I have something of a lot portion to study. I really get confused with the determination of Oxidation No. despite the methods shown in textbook! I have a chapter relating to basics of Structure of an Atom. Now in this...

The one of 11 is a really nice trick! Though, 7's rather a large trick. Aren't there any for the other numbers, 13, 17, and 19?

Hello, This is my first post. Anyways, from the beginning, since I started learning the subjects at higher level, I have faced this problem - How to determine if the nos. is a prime no. ? The numbers under 100 are known to me, but if a bigger digit comes, are there any tricks to...