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The relative atomic masses of many eleme...

The relative atomic masses of many elements are not whole numbers because

A

they cannot be determined very accurately

B

the atoms ionize during the determination of atomic masses

C

of the existence of isotopes

D

of the presence of impurities

Text Solution

Verified by Experts

The correct Answer is:
C
of the existence of isotopes
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S CHAND IIT JEE FOUNDATION-ATOMIC STRUCTURE-QUESTION BANK-20
  1. Members of which of the following have similar chemical properties?

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  2. The number of electrons in an element with atomic number X and mass nu...

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  3. The relative atomic masses of many elements are not whole numbers beca...

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  4. Atoms of which of the following have a valency equal to zero.

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  5. Calculate the number of electrons, protons and neutrons in sodium atom...

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  6. The nucleus of the atom of an element contains 17 protons and 18 neutr...

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  7. The atom of an element has 2 electrons in the M shell. What will be th...

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  8. Atomic number of Alis 13 and mass number is 27 .Calculate the number o...

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  9. An element has atomic number 15. What will be the valency/valencies sh...

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  10. An ion M^(3+) contains 10 electrons and 14 neutrons. What are the atom...

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  11. An ion X^(2-) contains 10 electrons and 8 neutrons. What are the atomi...

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  12. Calculate the number of protons, neutrons, and electrons in an atom of...

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  13. Calculate the atomic mass of chlorine, which consists of 76% of all th...

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  14. Calculate the atomic mass of silver, which occurs naturally as 52% sil...

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  15. Calculate the atomic mass of silicon, which occurs naturally as 92% si...

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  16. The ion of an element has 3 positive charges. The mass number of atom ...

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  17. How many electrons does an atom with an atomic number of 20 and a mass...

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  18. Which of the following do not represent Bohr's model of atom correctly...

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  19. Identify the Mg^(2+) ion from the figure where, n and p represent the ...

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  20. Elements with valency 1 are

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