Modern Periodic Table
Modern Periodic Table
Modern periodic table: In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental property and on the basis of this, he modified Mendeleev’s periodic law as “physical and chemical properties of the elements are a periodic function of their atomic number”. This is called modern periodic law. When the elements were arranged in the increasing order of the atomic number, the obtained table is called modern periodic law.
Features of Modern Periodic Table:
This table has 18 vertical columns, known as groups and 7 horizontal rows, known as periods.
Features of Groups:
Features of Periods:
We can explain the number of elements in the periods based on how electrons are filled into various shells. Maximum number of electrons that can be accommodated in a shell is given by the formula, . Where, n = number of given shell from the nucleus.
Some Facts:
The identities of some elements included in the seventh period have not been fully established. It can also be regarded as an incomplete period.
Block of Periodic Table:
The periodic table is divided in four blocks:
Students / Parents Reviews [20]
My experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
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7thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
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Barkha Arora
10thUsually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Anika Saxena
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Manish Kumar
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Om Umang
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Yatharthi Sharma
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Aman Kumar Shrivastava
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Barkha Arora
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Hiya Gupta
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thAbout 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.
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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
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