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Name:  a) three elements that have a s...

Name:
 a) three elements that have a single electron in their outermost shells 
b) two elements that have two electrons in their outermost shells .
c) three elements with filled outermost shells 

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(i) Na, K.
(ii) Ca, Mg.
(iii) He, Ne.
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OSWAAL PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-TOPIC:2- SHORT ANSWER TYPE QUESTIONS-II
  1. (a) Define the following terms: (i) Valency, (ii) Atomic size. (b)...

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  2. What is meant by a group in the Modern Periodic Table? How do the foll...

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  3. Name:  a) three elements that have a single electron in their outerm...

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  4. Calcium is an element with atomic number 20. Stating reason for each o...

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  5. Name any two elements of group one and write their electronic configur...

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  6. An element 'M' with electronic configuration (2,8,2) combines separate...

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  7. Two elements P and Q belong to the 3rd period of the Modern Periodic T...

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  8. An element 'X' (Atomic number = 20) burns in the presence of oxygen to...

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  9. An element 'X' belongs to third period and second group of the Modern ...

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  10. The atomic number of an element 'X' is 19. (i) Write its electronic ...

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  11. An element 'X' belongs to the 3rd period and group 16 of the Modern Pe...

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  12. An element X has mass number 35 and number of neutrons = 18. Write ato...

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  13. Three elements 'X', 'Y' and 'Z' have atomic numbers 7, 8 and 9 respect...

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  14. The position of eight elements in the modern periodic table is given b...

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  15. Four elements A, B, C and D have atomic numbers 12, 13, 14 and 15 resp...

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  16. From the following elements : (4)Be,(9)F,(19)K,(20)Ca (i) Select t...

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  17. Na, Mg and Al are the elements of the same period of modern periodic t...

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  18. The elements (4)Be,(12)Mgand(20)Ca each having two, valence electrons ...

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  19. Two elements 'P' and 'Q' belong to the same period of the modern perio...

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  20. The atomic number of an element 'X' is 20. (i) Determine the positio...

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