Discovery of Neutrons
Discovery of Neutrons
Discovery of Neutron : The helium atom has 2 electrons and 2 protons. So, the mass of the helium atom was expected to be twice the mass of the hydrogen atom, which has 1 electron and 1 proton. But, actually the mass of the helium atom is four times that of the hydrogen atom. It was found that atoms of all the elements (except hydrogen) were at least twice as heavy as could be explained by the number of protons they had. To explain this it was predicted that other particles with no charge, but mass equal to that of a proton, must be present in all atoms except hydrogen. This prediction was proved to be correct with the discovery of the neutron.
In 1932, James Chadwick bombarded the element beryllium with alpha-particles. He observed the emission of a radiation with the following properties.
Which of the following statement / statements are correct : (a) Neutron was discovered by James Chadwick (b) Neutron mass is -1.67 X 10-27 kg. (c) Neutrons are the sub atomic particles. (d) "N" is used to represent the term Neutron. | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following particles was discovered by James Chadwick? | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following is used to represent Neutrons?
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| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
