Proton-neutron hypothesis, Physics, Basic Statistics

Assignment Help:
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)

Related Discussions:- Proton-neutron hypothesis, Physics

Ploblem, free hand curve to measure secular trend

free hand curve to measure secular trend

Estimate stand-up time using the rmr system, SCENARIO It is proposed to...

SCENARIO It is proposed to construct a 3m diameter, 50m long tunnel, heading 0950, through the andesite lava flow at Maori Bay (Muriwai). As part of the preliminary investigati

Determine the sources of data, The next step is to determine the sources of...

The next step is to determine the sources of data to be used. The researcher has to decide whether he has to collect primary data ror depend exclusively on secondary data. Sometime

Rehearsal methods, A teacher is interested in comparing the effects of 3 di...

A teacher is interested in comparing the effects of 3 different parts of rehearsal methods (Rote rehearsal, Imagery, and Story) on number of words recalled. Participants are random

Operation research, meaning,definition,scope,origin,advantages and limitati...

meaning,definition,scope,origin,advantages and limitation of operation research ?

Read the passage below. What kind of variables are these — n, To examine a ...

To examine a program for educating health professionals in a sports injury clinic about the importance of keeping detailed medical records, a researcher does a controlled trial i

Regression Analysis, I have a regression analysis assignment using minicab,...

I have a regression analysis assignment using minicab, but I am not sue how to do with my current data set?

Report on the residual plots, Report on the residual plots – are the assump...

Report on the residual plots – are the assumptions of the regression met

LINEAR REGRESSION, Y=C+1075x,when x was 2, and y was 239, given that y inte...

Y=C+1075x,when x was 2, and y was 239, given that y intercept was 11. calculate the residual.

Quantitative research methods, I have four assignments that are due tomorro...

I have four assignments that are due tomorrow. Can you help?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd