The formula H₂O shows that water is made from two atoms of hydrogen (H) bonded to one atom of oxygen (O). Katie: Time for some science. And today it's a chemistry classic, the periodic table. And here ...

It's important to use the names and chemical symbols for the first 20 elements in the periodic table, as well as the elements in groups 1 and 7.

SYMBOLS are both an aid and an obstacle to thought. Their brevity and simplicity may help us, working according to a fixed system, to perform mental operations which without their aid might be ...

You should have at-least one formula book for every science subject to get good grades in your board exam and also to do well in competitive exams such as JEE and UPSC. These formula books will help ...