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How is the goiter in thyroid gland detected?

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How can you define monoatomic and polyatomic ion. Give example?

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Give one example each of the use of radioactive isotope in medicine and radiotherapy?

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Define Science?

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If an element has atomic number 13 and atomic mass 27;how much electrons are there in each atom of elements?

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Why does an electron first fill 2p orbital and then 3s orbital?

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Write any four properties of cathode rays?

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Define symbol. Give an example?

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Define Nobel gases. Give example?

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Define nuclear fission reaction.

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Define metal. Give example?

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Define Chemistry?

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Give three properties of positive rays

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Define substance. Give an example.

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Give the applications of isotopes in the field of radiotherapy and medicines

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What is Rutherford's atomic model? what were the main defects in it?

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How are cathode rays produce? What are its five major characteristics?

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How will you differentiate between Rutherford`s atomic theory and Bohr`s atomic theory?

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Give postulate of Dalton's Atomic theory.

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What do you mean by chemical calculations? Discuss in detail about mole-mass calculation and mole -partical calculations?

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