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Use Mendeleev.s periodic Law to predict ...

Use Mendeleev.s periodic Law to predict the formula of Oxides of potassium, aluminium and barium.

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Oxides of potassium, aluminium and barium are:
K is in Group 1. So, the oxide will be `K_2O` (Potassium oxide).
Al is in Group 3. So, the oxide will be `Al_2O_3` (Aluminium oxide).
Ba is in Group 2. So, the oxide will be BaO (Barium oxide).
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ICSE-THE PERIODIC TABLE -TOPIC 1 Modern Periodic Table and its Periodicity (3 Marks Questions )
  1. What is the need for classification of elements ?

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  2. Use Mendeleev.s periodic Law to predict the formula of Oxides of potas...

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  3. State the merits of Mendeleev's classification of elements.

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  4. State the merits of Mendeleev's classification of elements.

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  5. Name the element whose properties can be predicted on the basis of its...

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  6. Name two elements whose atomic weights were corrected on the basis of ...

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  7. How many elements were known at the time of Mendeleev's classification...

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  8. What are the groups known as ? Group 1

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  9. What are the groups known as ? Group 17

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  10. What are the groups known as ? Group 18

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  11. Name any one element of each group.

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  12. How does number of Valence electrons on moving from left to right In...

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  13. How does number of valency vary on moving from left to right In the ...

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  14. How does number of Valence electrons on moving from left to right In...

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  15. How does number of valency vary on moving from left to right In the ...

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  16. What is meant by a group in the periodic table?

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  17. Explain why the elements of the same group exhibit the same chemical b...

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  18. In which Group the inert gases are placed in the periodic table ?

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  19. A part of the periodic table is shown below with one element missing :...

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  20. A part of the periodic table is shown below with one element missing :...

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