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An element is place in 2^nd period,so it...

An element is place in `2^nd` period,so it has___shells

A

3

B

2

C

4

D

5

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CHETANA PUBLICATION-Periodic Classifications of ELements-EXAMPLE
  1. An element is place in 2^nd period,so it hasshells

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  2. Find the odd man out. Lithium,beryllium,boron,Chlorine

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  3. Find the odd man out. Sodium,Lithium,Copper,Beryllium

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  4. Find the odd man out. Dalton,Dobereiner,Moseley,Newlands

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  5. Find the odd man out. boron,Silicon,potassium,antimony

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  6. Find the odd man out. Aluminium,Argon,Xenon,Sodium

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  7. Find the odd man out. boron,Silicon,potassium,antimony

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  8. Find the odd man out. Lithium,beryllium,boron,Chlorine

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  9. Complete the anology Dobereiner:Traid::Newlands:

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  10. Complete the anology Mendeleev's periodic Table: Atomic mass:: Mode...

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  11. Complete the anology Hydrogen:First period ::Lithium:

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  12. Complete the anology Fluorine:2,7:: chlorine:

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  13. Complete the anology Group 1:Alkali metals :: : alkaline earth meta...

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  14. Complete the anology Transition elements :d-block:: inner transitio...

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  15. Complete the anology Tellurium:--------:: Radium:Metal

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  16. Complete the anology Transition elements:------Inner transition ele...

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  17. Complete the anology Lanthanides:Ce to Lu::Actinides:

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  18. Complete the anology Ca:Alkaline earth metal:: Cs:

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  19. Complete the anology Fe:Electropositive :: CI:

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  20. Complete the anology (Li,Na,K):::(F,CI,Br): Group 17

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  21. Complete the anology Valency of Na(2,8,1):1(One)::Valency of P(2,8,...

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