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Give symbols of the following elements: ...

Give symbols of the following elements:
Potassium, aluminium, cadmium, chlorine, uranium, gold, mercury, lead, tin and flourine.

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Sodium and aluminium have atomic numbers of 11 and 13 respectively they are separated by one element in the periodic table and have valencies of 1 and 3 respectively. chlorine and potassium are also separated by one element in the periodic table(their atomic numbers are 17 and 19 respectively) and yet both have valency of one. explain your answer

SWAN PUBLICATION-ATOMS AND MOLECULES-IMPORTANT Q/A
  1. How many molecules are present in 9g of water ?

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  2. How many molecules are present in 17g of ammonia

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  3. Calculate the number of moles in 17 g of H(2)O(2).

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  4. Give symbols of the following elements: Potassium, aluminium, cadmiu...

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  5. Calculate the molecular mass of the following CO(2)

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  6. Calculate the molecular mass of the following (using atomic mass). N...

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  7. Calculate the molecular mass of the following (using atomic mass). C...

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  8. Calculate the molecular mass of the following (using atomic mass). H...

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  9. Calculate the molecular mass of the following (using atomic mass). S...

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  10. Calculate the molecular mass of the following (using atomic mass). H...

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  11. Calculate the formula mass of the compounds whose formulae are given b...

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  12. Calculate the formula mass of the compounds whose formulae are given b...

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  13. Calculate the formula mass of the compounds whose formulae are given b...

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  14. Calculate the formula mass of the compounds whose formulae are given b...

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  15. Sodium carbonate (Na(2)CO(3).10H(2)O) is an important industrial chemi...

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  16. What is the mass of : 1 mole of nitrogen atoms ?

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  17. What is the mass of : 4 mole of Al atoms

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  18. What is the mass of : 1.50 mol of Na^(+) ions

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  19. What is the mass of : 10 moles of sodium sulphite (Na2SO3)?

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  20. A sample of ammonia (NH(3)) weighs 2.00g. What mass of sulphur dioxide...

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