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Arrange the following elements in the de...

Arrange the following elements in the descending order of atomic size and give a reason for your answer. Mg, CI, P. Ar Atomic number of elements is 12, 17, 15, 18.

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`Mg, P , Cl , Ar` Increase in the atomic number means increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom.
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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (SHORT ANSWER (SA) TYPE QUESTIONS)
  1. How would the tendency to lose electrons change as you go i] from le...

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  2. i] Atomic radius of hydrogen is 37 pm. Express it in metres. ii] How...

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  3. Arrange the following elements in the descending order of atomic size ...

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  4. The position of elements A, B, C, D in the modern periodic table is gi...

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  5. ‘Hydrogen occupies a unique position in the Modern Periodic Table.' Ju...

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  6. Write the formula of the product formed when the element A (atomic num...

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  7. a) Discuss any two achievements of the Modern Periodic Table. b) Dis...

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  8. a] Why are sodium and chlorine placed in the same period in the Modern...

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  9. What is the basis of the Modern Periodic Table? Why lithium with atomi...

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  10. a] Mention the relative position of metals, non-metals, and metalloids...

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  11. The elements Be, Mg, and 20Ca each having two valence electrons in the...

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  12. Based on the group valency of elements state the formula for the follo...

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  13. State three reasons for placing chlorine and bromine in the same group...

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  14. Atoms of seven elements A, B, C, D, E, F, and Ghave different number o...

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  15. The positions of A, B, C, D, E, F, and in the Modern Periodic Table ar...

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  16. Consider the part of the periodic table given below and answer the fol...

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  17. An element Y has three shells with four electrons in the valence shell...

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  18. Lithium is an alkali metal with atomic number = 3 and number of valenc...

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  19. An element X (atomic number 17) reacts with an element Y (atomic numbe...

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  20. An element P (atomic number 20) reacts with an element Q (atomic numbe...

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