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NCERT ENGLISH-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
- Use Mendeléev’s Periodic Table to predict the formulae for the oxides ...
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- Besides gallium, which other elements have since been discovered that ...
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- What were the criteria used by Mendeléev in creating his Periodic Tabl...
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- Why do you think the noble gases are placed in a separate group?
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- How could the Modern Periodic Table remove various anomalies of Mendel...
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- Name two elements you would expect to show chemical reactions similar ...
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- Name (a) three elements that have a single electron in their outermo...
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- (a) Lithium, sodium, potassium are all metals that react with water to...
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- In the Modern Periodic Table, which are the metals among the first ten...
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- By considering their position in the Periodic Table, which one of the ...
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- Which of the following statements is not a correct statement about the...
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- Element X forms a chloride with the formula XCl(2), which is a solid w...
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- Which element has (a) two shells, both of which are completely filled...
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- (a) What property do all elements in the same column of the Periodic T...
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- An atom has electronic configuration 2, 8, 7. (a) What is the atomic n...
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- The position of three elements A, B and C in the Periodic Table are sh...
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- Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to...
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- How does the electronic configuration of an atom relate to its positio...
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- In the Modern Periodic Table, calcium (atomic number 20) is surrounded...
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- Compare and contrast the arrangement of elements in Mendeléev’s Period...
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