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Nitrogen (14.0 u) , phosphorus (31.0 u) ...

Nitrogen (14.0 u) , phosphorus (31.0 u) and arsenic (74.9 u) have similar properties . Do the they form a Dobereiner 's triad ? Comment .

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To determine whether nitrogen (N), phosphorus (P), and arsenic (As) form a Dobereiner's triad, we need to follow these steps: ### Step 1: Understand Dobereiner's Triad Dobereiner's triad is a concept in chemistry where three elements with similar properties are grouped together. The atomic mass of the middle element should be approximately equal to the arithmetic mean of the atomic masses of the other two elements. ### Step 2: Identify the Atomic Masses - Nitrogen (N) = 14.0 u - Phosphorus (P) = 31.0 u ...
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PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -Additional Question (very short answer question )
  1. Nitrogen (14.0 u) , phosphorus (31.0 u) and arsenic (74.9 u) have s...

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  2. Which one of the following elements posed a challenge to Newlands ...

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  3. Which important property did Mendeleev use to classify the eleme...

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  4. The basis for the classification of elements in the modern periodic t...

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  5. State the modern periodic law.

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  6. What are horizontal rows and vertical columns of the periodic tabl...

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  7. Which two elements of the following belong to the same period ? A1...

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  8. What is the IUPAC name official name and symbol of the element ...

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  9. What are super heavy elements?

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  10. What are the atomic number of the elements which constitute f- b...

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  11. Lanthanoids and actinoids are placed in separate rows at the botto...

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  12. Why Ar (argon) (at, wt. = 39.94) has been placed before K (at. Wt. = 3...

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  13. In terms of electronic configuration, what the elements of a given per...

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  14. Name the groups of elements classified as s- ,p - and d- blocks.

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  15. To Which block (s,p , d or f ) does the element with atomic numbe...

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  16. Which among the following is a transition element?

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  17. Which has a larger radius : (i) Mg or Ca (ii) S or Si

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  18. Compare the size of (a) Na atom with Na^(+) ion (b) Cl atom with C...

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  19. Give four examples of species which are isoelectronic with Ca^(2+...

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  20. Arrange the following ions in order of decreasing ionic radii : ...

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