Home
Class 9
CHEMISTRY
If elements with principal quantum numbe...

If elements with principal quantum number `n gt 4` is not allowed in nature, the number of possible elements would be:

A

60

B

32

C

64

D

50

Text Solution

Verified by Experts

The correct Answer is:
A
For `n le 4` only 30 orbitals are possible so only 60 electrons can be accommodated.
Promotional Banner

Topper's Solved these Questions

  • ATOMIC STRUCTURE

    CENGAGE CHEMISTRY|Exercise MANDATORY EXERCISE (Exercise Set III)|4 Videos

  • ATOMIC STRUCTURE

    CENGAGE CHEMISTRY|Exercise MANDATORY EXERCISE (Exercise Set IV)|24 Videos

  • ATOMIC STRUCTURE

    CENGAGE CHEMISTRY|Exercise OLYMPIAD AND NTSE LEVEL EXERCISES|10 Videos

  • ACIDS, BASES AND SALTS

    CENGAGE CHEMISTRY|Exercise Olympiad And NTSE Level exercises|10 Videos

  • CHEMICAL ARITHMETIC

    CENGAGE CHEMISTRY|Exercise MANDATORY EXERCISE (EXERCISE SET III) (OLYMPIAD AND NTSE LEVEL EXCERCISES)|10 Videos

Similar Questions

Explore conceptually related problems

If elements with principal quantum number ngt 4 were not allowed in nature, the number of possible elements would be:

If element with particle quantum number ngt4 were not allowed in nature , the number of posible elemant would be

The principal quantum number, n describes

If elements of quantum number greater than n were not allowed , the number of possible element in nature would be ?

The principal quantum number representwsw

The principal quantum number of an atom is related in the

If in nature they may not be an element for which the principle quantum number n gt 4 , then the total possible number of elements will be

CENGAGE CHEMISTRY-ATOMIC STRUCTURE-MANDATORY EXERCISE (Exercise Set II)
  1. A neutral atom of an element contains 17 electrons. Its nucleus has 20...

    Text Solution

    |

  2. The size of the nucleus is approximately

    Text Solution

    |

  3. e/m ratio is highest for

    Text Solution

    |

  4. Increasing order for the value of charge/mass is

    Text Solution

    |

  5. Which one of the following pair represents isobars?

    Text Solution

    |

  6. An isotone of ""(32)^(76)Ge is -

    Text Solution

    |

  7. Which of the following are isoelectronic?

    Text Solution

    |

  8. Consider the following pairs of ions: (1) Sc^(3+) and Ti^(4+) (2)...

    Text Solution

    |

  9. Which of the following salt has isoelectronic cation and anion?

    Text Solution

    |

  10. How many unpaired electrons are present in Ni^(2+)?

    Text Solution

    |

  11. Which of the following has minimum number of unpaired d-electrons?

    Text Solution

    |

  12. Hund's rule is applicable for:

    Text Solution

    |

  13. Which quantum number determines the shape of the orbital?

    Text Solution

    |

  14. Magnetic quantum number specifies:

    Text Solution

    |

  15. The correct set of n, l, m, quantum numbers for the unpaired electron ...

    Text Solution

    |

  16. In a quantum level the energies of the orbitals will be in the order:

    Text Solution

    |

  17. The set of quantum numbers for the 19th electron in chromium is:

    Text Solution

    |

  18. If elements with principal quantum number n gt 4 is not allowed in na...

    Text Solution

    |

  19. Number of waves made by a Bohr electron in an orbit of maximum magneti...

    Text Solution

    |

  20. A given orbital is labelled by the magnetic quantum number m=-1. This ...

    Text Solution

    |