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Define ionisation energy....

Define ionisation energy.

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Ionisation energy is required to remove an electron from a neutral gaseous atom.
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Arrange S, P and As in order of increasing ionisation energy.

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The first ionisation energy of magnesium is greater than that of sodium, whereas the recerse is true for second ionisation energy. Explain.

The minimum amount of energy which is required to remove an outermost electron from any isolated neutral gaseous atom is known as first ionisation energy. These are the following factors which effect ionisation energy. (i) Ionisation energy prop (1)/("Principal quantum number") (ii) Ionisation energy prop Z_(eff) (iii) If orbitals are fully filled or half filled so stability will be more and ionisation energy will be high. (iv) If penultimate electron will effectively shield the nucles, ionisation energy will be less and vice versa. Which of the following has maximum Ist ionisation energy?

The minimum amount of energy which is required to remove an outermost electron from any isolated neutral gaseous atom is known as first ionisation energy. These are the following factors which effect ionisation energy. (i) Ionisation energy prop (1)/("Principal quantum number") (ii) Ionisation energy prop Z_(eff) (iii) If orbitals are fully filled or half filled so stability will be more and ionisation energy will be high. (iv) If penultimate electron will effectively shield the nucles, ionisation energy will be less and vice versa. Choose the correct order of Ist ionisation energy

CENGAGE CHEMISTRY-APPENDIX - INORGANIC VOLUME 1-Exercise very short
  1. Define (a) ionic radii and (b) covalent radii.

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  2. Why do noble gases have bigger atomic size than halogens?

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  3. Define ionisation energy.

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  4. How does ionisation energy vary (a) down the group and (b) along the p...

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  5. A and B belong to same group of periodic table. A has higher atomic nu...

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  6. The problem of position of isotopes in the periodic table was avoided ...

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  7. Two different elements may have same mass number but not the same .

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  8. When compared to lithium, it is easier to remove valence electron from...

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  9. Chlorine has electron affinity than fluorine.

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  10. Among (the non-radioactive) halogens the element that has the lowest e...

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  11. Name the radioactive element of group 17 and group 18 .

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  12. Among Li,Na,K,Rb,Cs, the element with the lowest ionisation energy is ...

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  13. Electron Gain Enthalpy

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  14. Generally electron gain enthalpy on going down a group, and on going...

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  15. Why is the second electron gain enthalpy negative (i.e. energy is abs...

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  16. Why fluorine has lesser electron gain enthalpy than chlorine?

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  17. Isoelectronic species have the same number of .

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  18. Lanthanides and actinides belong to block of the periodic table.

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  19. Generally, the atomic size along a period gradually decreases due to i...

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  20. The formula for fluoride of carbon is .

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