Composition of the nucleus, Chemistry

Assignment Help:

Q. Composition of the nucleus

Since the time of Rutherford, other scientists have learned a significant amount about the fundamental properties about the nucleus of an atom. In particular, they were able to discover that the nucleus was composed of fundamental particles called protons and neutron.

The Proton

In an experiment where he used a modified cathode-ray tube, Thompson realized that there were rays traveling in a direction opposite to that of the negative cathode-rays made up of electrons. Thompson showed that these rays were composed of positively-charged particles that have the same amount of electrical charge, but of opposite sign, as electrons. These particles were eventually given the name of protons.

The Neutron

Scientists were confused as they realized that the total mass of the atom was more than just the sum of the masses of the protons and electrons. They suspected that the atom contained a third type of subatomic particle that contributed to the atomic mass.

However, as this particle did not have an electrical charge, and therefore was neutral, it was more difficult to detect that the electron and proton. In 1932, an English scientist named James Chadwick showed that an atom contains a third kind of subatomic particle which he called a neutron. A neutron has about the same mass as a proton and is also found in the nucleus of the atom. However, unlike the proton, the neutron does not have an electric charge.


Related Discussions:- Composition of the nucleus

Reaction, How do you mean by chemistry?

How do you mean by chemistry?

Uses of unsaturated halides (halo-alkene), Uses of Unsaturated halides (Hal...

Uses of Unsaturated halides (Halo-alkene) The major use of vinyl chloride is in the manufacture of polyvinyl chloride that is abbreviated as PVC plastic that is employed these

Melting point, how can the melting point be used to determine the purity of...

how can the melting point be used to determine the purity of organic compounds

Physical properties of ether - boiling points and solubility, Physical prop...

Physical properties of Ethers - Boiling points and Solubility (a) Boiling points: Boiling points of ethers are very much lower as compared to those of isomeric alcohols, althou

Differentiate soft magnetic from hard magnetic material, Differentiate soft...

Differentiate soft magnetic material from hard magnetic material in respect of hysteresis losses, eddy current losses and domain wall motion with appropriate examples and plots.

Feat of formation, Explain and Define standard feat of formation Ans) Th...

Explain and Define standard feat of formation Ans) The amount of heat liberated of absorbed when single mole of compound is formed in its standard state from its elements in the

S block elements, why lithium and beryllium markedly differ from other memb...

why lithium and beryllium markedly differ from other members of their respective groups?

Iodoform, what is reaction for propanone in iodoform test

what is reaction for propanone in iodoform test

Carbon and its compounds, Carbon And its Compounds Carbon is a typical ...

Carbon And its Compounds Carbon is a typical non-metal present in earth's crust to the extent of 0,02% by mass. All living organisms contain carbon and hydrogen as their ess

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