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An atom has the electronic structure of ...

An atom has the electronic structure of 2,7
(a) What is the atomic number of this atom?
(b) To which of the following would it be chemically similar?
`""_(7)N, ""_(15)P, ""_(17)Cl, ""_(18)Ar`
(c) Why would you expect it to be similar?

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Verified by Experts

The correct Answer is:
(a) 9 (b) `._(17)Cl` (c) Both have the same number of electrons (7 electrons each) in their atoms
NA
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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
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  2. The atomic numbers of the three elements X,Y and Z are 2,6 and 10 resp...

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  3. An atom has the electronic structure of 2,7 (a) What is the atomic n...

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  4. Consider the following elements, ""(20)Ca, ""(8)O, ""(18)Ar, ""(16)S...

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  5. In the each of the following pairs, choose the atom having the bigger ...

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  6. The atomic numbers of three elements A,B and C are given below: Elem...

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  7. An element X belongs to 3rd period and group 2 of the periodic table. ...

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  8. The following diagram shows a part of the periodic table in which the ...

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  9. An element X is in group of the periodic table: (a) What will be the...

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  10. An element Y is in second period and group 16 of the periodic table: ...

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  11. (a) An element X has mass number 40 and contains 21 neutrons in its at...

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  12. An element X combines with oxygen to form an oxide XO. This oxide is e...

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  13. An element A has an atomic number of 6. Another element B has 17 elect...

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  14. The elements A,B,C and D belong to groups 1,2,14 and 17 respectively o...

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  15. An element X from group 2 reacts with element Y from group 16 of the p...

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  16. A metal X is in the first group of the periodic table. What will be th...

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  17. An element A from group 14 of the periodic table combines with an elem...

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  18. An element X from group 2 of the periodic table reacts with an elemen...

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  19. The following diagram shows a part of the periodic table containing f...

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  20. The elements A,B and C belong to groups 1,14 to 17 respectively of the...

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