22.THE ATOMIC STRUCTURE-Discovery of The Nucleus.

We continue our discussion from the earlier topic and delve still deeper into the subatomic domain.The Plum Pudding Model, hypothesized by Sir J.J. Thompson failed to correctly explain the structure of atom but his efforts didn’t entirely go in vain – thanks to his student Ernest Rutherford – a genius who unleashed the power of…

21.THE ATOMIC STRUCTURE- History,Discovery of Electron.

Today we start a long discourse on a very fundamental topic which is at the core of not only Chemistry but to the understanding of the whole universe  – ATOMIC STRUCTURE. We know , that all the matter in this universe is made up of matter.So what is this matter made up of ? Let us now begin our…

20.Significant Figures- II

Since our last post we are trying to get an overview of the concept of significant figures and we shall continue to do so in this post as well. Let us begin by understanding how the concept of significant figures deals with precision and accuracy.Suppose we are measuring volume of a liquid in the laboratory.This…

19.Significant Figures-I

  We have been exploring the topics ‘measurements’ and ‘errors‘ in the previous few posts. Whatever we have learned till now,can be recapitulated as follows – During various calculations that we carried out during studying these parameters, we oftentimes encountered numbers with more digits after the decimal point. In such cases, we rounded off the digits. e.g….

18.Analysis of errors-III (Deviation & Standard Deviation).

Our last post was all about studying different parameters and formulas. In this post let us study two very important concepts, from among various parameters studied in the last post, namely – Deviation and Standard Deviation thoroughly. A]Deviation-Deviation is a simple concept to understand. It tells us how much, an individual value in a given…

17.Analysis of errors-II

We have been studying all about errors in the last few posts.We continue our discussion further and talk in greater detail about ways of expressing accuracy and precision in this post. We have already studied how to calculate absolute and relative error in post 15.We studied that – A.E = xi – T where, A.E ⇒ Absolute error….