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Given below are atomic radii of same ele...

Given below are atomic radii of same elements of second period.
`{:("Element","B","O","N","C"),("Atomic Radii in pm","88","66","74","77"):}`
Arrange these elements in the increasing order of their atomic number. Give reason for your answer.

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B, C, N, O.
In a period, as the atomic number increases, size of the atom decreases. This is because increase in nuclear charge tends to pull electrons closer to nucleus and reduces the size of the atom.
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OSWAAL PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-TOPIC:2-SHORT ANSWER TYPE QUESTIONS-I
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  2. How does the atomic radius change as we go : (i) from left to right ...

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  3. (i) State the basis of classification of elements in the modern period...

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  9. i] Atomic radius of hydrogen is 37 pm. Express it in metres. ii] How...

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  10. Nitrogen (atomic number 7) and phosphorous (atomic number 15) belong t...

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  11. Na, Mg, Al and P belong to 3^(rd) period but are placed in first, seco...

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  12. (i) Element 'Y' with atomic number 3 combines with element 'A' with at...

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  13. (i) How does the tendency to gain electrons change as we go down the g...

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  14. Given below are atomic radii of same elements of second period. {:("...

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  16. Two elements X and Y have atomic numbers 12 and 16 respectively. To wh...

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  17. The atomic number of elements A, B, C, D and E are given below: F...

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