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Which of the following statements is alw...

Which of the following statements is always correct?

A

an atom has equal number of electrons and protons.

B

an atom has equal number of electrons and neutrons.

C

an atom has equal number of protons and neutrons.

D

an atom has equal number of electrons, protons and neutrons.

Text Solution

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The correct Answer is:
A
an atom has equal number of electrons and protons.
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S CHAND IIT JEE FOUNDATION-ATOMIC STRUCTURE-QUESTION BANK-20
  1. The atomic number of an element is 15. Hence, it will show a valency o...

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  2. The valency of which of the elements is zero?

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  3. Which of the following statements is always correct?

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  4. The number of valence electrons present in noble gases is:

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  5. Oxygen has an atomic number of 8. Which of the following could form th...

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  6. An atom of element X contains 3 protons, 3 electrons and 4 neutrons: ...

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  7. An atom of element X contains 3 protons, 3 electrons and 4 neutrons: ...

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  8. An atom of element X contains 3 protons, 3 electrons and 4 neutrons: ...

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  9. An atom of element X contains 3 protons, 3 electrons and 4 neutrons: ...

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  10. An atom of element X contains 3 protons, 3 electrons and 4 neutrons: ...

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  11. An atom of element X contains 3 protons, 3 electrons and 4 neutrons: ...

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  12. An atom of element X contains 3 protons, 3 electrons and 4 neutrons: ...

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  13. Atomic models have been improved over the years. Arrange the following...

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  14. For an atomic number 20, the 20th electron will occupy

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  15. Members of which of the following have similar chemical properties?

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

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

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

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

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

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