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An atom has electronic configuration 2,8...

An atom has electronic configuration 2,8,7. What is the atomic number of this elements?

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SWAN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -ADDITIONAL IMPORTANT QUESTIONS (Short Answer Type Questions)
  1. The element Be, Mg, Ca are placed in the second group of the periodic ...

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  2. Table given below shows a part of the periodic table: Using this ...

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  3. Table given below shows a part of the periodic table: Using this ...

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  4. Table given below shows a part of the periodic table: Using this ...

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  5. Explain the following term- Sericulture

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  6. Two elements X and Y belong to group 1 and 2 - respectively in the sam...

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  7. Two elements X and Y belong to group 1 and 2 - respectively in the sam...

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  8. Two elements X and Y belong to group 1 and 2 - respectively in the sam...

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  9. Two elements X and Y belong to group 1 and 2 - respectively in the sam...

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  10. Two elements X and Y belong to group 1 and 2 - respectively in the sam...

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  11. Two elements X and Y belong to group 1 and 2 - respectively in the sam...

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  12. Lithium, sodium potassium are all metals that react with water to libe...

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  13. Explain the following term- Rearing.

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  14. An atom has electronic configuration 2,8,7. What is the atomic number ...

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  15. The formula of magnesium oxide is Mgo. State the formula of barium nit...

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  16. What is metalloid ?

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  17. Fill in the blanks- Due to in clinical thermometer, mercury does not ...

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  18. Fill in the blanks- is the solid wate collected from waste water duri...

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  19. Write newland's law of octaves for classification of elements.

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  20. Why Newland's law, is called "Law of Octaves."?

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