Proton-neutron hypothesis, Physics, Basic Statistics

This hypothesis was put forward by Heinsberg after the discovery by Chadwick.

According to this hypothesis, a nucleus of mass number A and atomic number Z contains Z protons, and (A – Z) neutrons. As an atom is electrically neutral, therefore, number of peripheral electrons must be equal to Z, the number of protons inside the nucleus.

This hypothesis explained all the discrepancies of proton electron hypothesis.

As is known, a neutron is a neutral particle carrying no charge. A proton carries a unit positive charge. Proton is slightly lighter than a neutron.

A proton and a neutron may be regarded as two different charge states of the same particle, called nucleon.

As the atom is electrically neutral, number of electrons in an atom is equal to the number of protons inside the nucleus.

Atomic number of an element is the number of protons present inside the nucleus of an atom of the element. It is also equal to the number of electrons revolving in various orbits around the nucleus of the atom. It is represented by Z.

Mass number of an element is the total number of protons and neutrons present inside the atomic nucleus of the element. It is represented by A.

Thus, in an atom, number of protons = Z

Number of electrons = Z

Number of nucleons = A

Number of neutrons = (A – Z)
Posted Date: 1/31/2012 11:09:58 PM | Location : United States







Related Discussions:- Proton-neutron hypothesis, Physics, Assignment Help, Ask Question on Proton-neutron hypothesis, Physics, Get Answer, Expert's Help, Proton-neutron hypothesis, Physics Discussions

Write discussion on Proton-neutron hypothesis, Physics
Your posts are moderated
Related Questions
Accounting Standards Aims and Objectives:  The aim of this report is to understand the various changes that have taken place in the accounting standards in various countries since

discuss the nature and causes of the components of an economic time series?

The following are actual data showing the latitude of a sample of major cities in the northern hemisphere and their mean high annual temperature. latitude(X)    mean high temp(Y

There are two firms competing in quantity. Firm 1 and 2 set their quantities supplied, q1 and q2, respectively. The production costs are zero. The market price is given by

what are the procedure of job order costing

a) What is analysis of variance? What are the assumptions of this technique? b) Three samples below have been obtained from normal populations with equal variances. Test the hypoth

Lifts usually have signs indicating their maximum capacity. Consider a sign in a lift that reads “maximum capacity 1400kg or 20 persons”. Suppose that the weights of lift-users are

discuss the considerations to be borne in mind when constructing index numbers

What is a hypothesis test? Why do we need to use them to make decisions about relating sample results to the population; why can’t we just make our decisions by the sample value?

Textbook The basic practice of statistics, 5th Edition by David S. Moore; Freeman EX:14.37, 14.38, 14.39, 17.5, 17.28a