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On moving from left to right in a period...

On moving from left to right in a period in the periodic table, the size of the atom.

A

increases

B

decreases

C

remains the same

D

first increaes then decreases

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The correct Answer is:
B

NA
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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. The element which forms a basic oxide has the atomic number of:

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  2. Which one of the following does not increase while moving down the gro...

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  3. On moving from left to right in a period in the periodic table, the si...

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  4. Which of the following set of elements is written in order of their in...

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  5. The atomic numbers of the three elements X,Y and Z are 2,6 and 10 resp...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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