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With reference to the periodic table, na...

With reference to the periodic table, name the following :
(a) the halogen in the fifth period, (b) the non-metal having porperties similar to phosphorous and (c) the most reactive metal of third period.

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I, N and Na
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AAKASH SERIES-PERIODIC TABLE-QUESTIONS FOR DESCRIPTIVE ANSWERS
  1. How are bond energies useful for the calculation of electronegativity?

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  2. Both ionisation enthalpy and electron gain enthalpy have some irregula...

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  3. With reference to the periodic table, name the following : (a) the h...

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  4. Mention different chemical criteria to call an element as metal.

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  5. How do you account for the highly electro-positive nature of alkali me...

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  6. What are anhydrides? Write exmples of acidic and basic anhydrides.

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  7. Alkali metals are good reductants and halogens are good oxidants. Why?

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  8. Comment on the following : (a) vertical relationship of elements, (b...

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  9. How many periods are needed to accommodate all elements up to Z value ...

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  10. How is polarisation power useful in explaining the diagonal relationsh...

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  11. I1 and I2 of an element are 700 and 1200 kJmol""^- If 1000 kJ "mol"^(-...

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  12. The energy required for the following process is 1.96 xx 104" kJ mol"^...

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  13. Compare the ionisation potentials of He and He^(+). Account for the di...

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  14. Bond energies of H2, F2 and HF are respec tively 104.2, 36.6 and 134.6...

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  15. Ionisation enthalpy of chlorine is "13 eV atom"^(-1) Electron gain ent...

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  16. Be forms Be^(2+) and Al^(3+) forms Al^(3+). If the radii of Be^(2+) an...

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  17. Among F((g))^(-),Cl((g))^(-0),Br((g))^(-) and I((g))^(-),  which one r...

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  18. Among Li(g), Cs(g), Cl(g) and Cl((g))^(-)  which one requires the leas...

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  19. If we assumed that each orbital can accomidate three electrons, then c...

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  20. An element with the electronic configuration [Xe] 6s^(2)4f^(14)5d^(1) ...

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