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9th ICSE
IMPORTANT
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Write short note on the valency.

Important Questions on The Periodic Table

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9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>CHAPTER EXERCISE>Q 23
Write short note on the metallic character.
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9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>CHAPTER EXERCISE>Q 24
Write a reactions showing action of acids on alkaline earth metal.
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9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>CHAPTER EXERCISE>Q 25

Which element has two shells, both of which are completely filled with electrons?

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9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>CHAPTER EXERCISE>Q 25

Which element has the electronic configuration 2 ,8, 2?

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9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>CHAPTER EXERCISE>Q 25

Which elements has a total of three shells with four electrons in its valence shell?

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9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>CHAPTER EXERCISE>Q 25

Which element has a total of two shells, with three electrons in its valence shell?

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9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>CHAPTER EXERCISE>Q 25

Which element has twice as many electrons in its second shell as in its first shell?

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9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>CHAPTER EXERCISE>Q 26
Nitrogen (atomic number =7) and phosphorus (atomic number =15) belong to group 15 of the periodic table. Write the electronic configuration of these two elements. Which will be more electronegative and why?