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What makes caesium and potassium useful ...

What makes caesium and potassium useful as electrodes in photoelectric cells?

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Alkali metals can be detected by the respective flame tests and can be determined by the flame photo metry (or) atomic absorption spectroscopy.
Alkali metals when irradiated with light, the light energy absorbed may be sufficient to make an atom lose electron.
THis makes caesium and potassium useful as electrodes in photo electric cells.
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-THE S-BLOCK ELEMENTS -SHORT ANSWER QUESTIONS
  1. Alkali metals and their salts impart characteristic colours to an oxid...

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  2. What makes caesium and potassium useful as electrodes in photoelectric...

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  3. Write a short note on the reactivity of alkali metals towards air.

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  4. Give any two uses for each of the following metals. (i) Lithium (ii) ...

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  5. Give an account of the properties of washing soda.

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  6. Mention some uses of sodium carbonate.

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  7. How do you obtain pure sodium chloride from a crude sample?

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  8. What do you know about Castner-Kellner process? Write the principle in...

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  9. Write a few applications of caustic soda.

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  10. Give an account of the biological importance of Na^(+) and K^(+) ions.

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  11. Mention the important uses of Mg metals.

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  12. Show that Be(OH)(2) is amphoteric in nature.

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  13. Write a note on the anomalous behaviour of beryllium.

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  14. Be shows diagonal relationship with Al. Disicuss.

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  15. What is Plaster of Paris? Write a short note on it.

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  16. In what ways lithium shows similarities to magnesium in its chemical b...

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  17. When an alkali metal dissolves in liquid ammonia the solution can acqu...

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  18. What happens when (i) Sodium metal is dropped in water (ii) Sodium met...

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  19. State as to why (i) An aqueous solution of Na(2)CO(3) is alkaline.

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  20. How would you expalain the following observation? (i)BeO is almost i...

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