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Which elements has Twice as many elect...

Which elements has
Twice as many electrons in its second shell as in its first shell ?

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Carbon has twice the number electrons in its second shell than the first shell
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An element Y has three shells with four electrons in the valence shell. Another element X has twice as many electrons in its second shell as in its first shell. i] Identify the elements X and Y. ii] Is there any similarity between the element Y and X? If so, what?

Which element has : (i) two shells, both of which are completely filled with electrons ? (ii) the electronic configuration, 2, 8, 2. (iii) a total of three shells, with four electrons in its valence shell ? (iv) a total of two shells, with three electrons in its valence shell ? (v) Twice as many electrons in its second shell as in its first shell ?

Which element has: a] two shells, each completely filled with electrons? b] the electron configuration 2, 8, 2? c] three shells, with four electrons in the valence shell? d] two shells, with three electrons in its valence shell? e] twice as many electrons in its second shell as in its first shell?

An element has same number of electrons in I and IV shells and in the II and III shells i] Write its electronic configuration ii] Write the group and period it belong iii] What is the valency of the element

Given below are some elements of the Modern Periodic Table: ""_(4)Be, ""_(26)Fe.""_(14)Si, ""_(19)K ""_(20)Ca i) Select the element that has one electron in the outermost shell and write its electronic configuration. ii) Select two elements that belong to the same group. Give reason. iii) Select two elements that belong to the same period. Which one of the two has a bigger atomic size?

Which elements has A total of three shells, with four electrons in its valence shell ?

Which elements has A total of two shells, with three electrons in its valence shell ?

An atom of element A has 3 electrons in its valence shell and an atom of B has 6 electrons in its valence shell. The formula of the compound between these two atoms will be :

Which element has the greatest tendency to lose electrons?

SUBHASH PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-TEXTBOOK EXERCISE QUESTION
  1. Which of the following statements is not a correct statement about tbe...

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  2. Element X forms a chloride with the formula XCl which is a solid with ...

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  3. Which elements has two shells, both of which are completely filled w...

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  4. Which elements has The electronic configuration 2,8,2 ?

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  5. Which elements has A total of three shells, with four electrons in i...

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  6. Which elements has A total of two shells, with three electrons in it...

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  7. Which elements has Twice as many electrons in its second shell as in...

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  8. What property do all elements in the same column of the Periodic Table...

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  9. What property do all elements in the same column of the Periodic Table...

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  10. An atom has electronic configuration 2, 8, 7 what is the atomic numb...

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  11. An atom has the electronic configuration 2, 8, 7. a] What is the ato...

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  12. The position of three elements A, B and C in the periodic Table is sho...

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  13. The position of three elements A, B and C in the periodic Table is sho...

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  14. The position of three elements A, B and C in the periodic Table is sho...

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  15. The position of three elements A, B and C in the periodic Table is sho...

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

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  17. How does the electronic configuration of an atom related to its positi...

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  18. In the modern periodic table, calcium (atomic number 20) is surrounded...

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  19. Compare and contrast the arrangement of elements in Mendeleev's period...

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