Home
Class 11
CHEMISTRY
Symbols .(35)^(79) Br and ^(79)Br can b...

Symbols `._(35)^(79) Br and ^(79)Br` can be written whereas symbols ` _(79)^(35) Br and ^(35)Br` are not acceptable. Answer briefly.

Text Solution

AI Generated Solution

To understand why the symbols `._(35)^(79) Br` and `^(79)Br` are acceptable while `_(79)^(35) Br` and `^(35)Br` are not, we need to look at the conventions for representing atomic symbols. ### Step-by-Step Solution: 1. **Understanding Atomic Notation**: - The standard notation for an atom is represented as \( _Z^A X \), where: - \( X \) is the chemical symbol of the element. - \( A \) (the mass number) is the total number of protons and neutrons in the nucleus. ...
Promotional Banner

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    NCERT ENGLISH|Exercise EXERCISE|67 Videos

  • STATES OF MATTER

    NCERT ENGLISH|Exercise EXERCISE|23 Videos

  • THE P-BLOCK ELEMENTS

    NCERT ENGLISH|Exercise EXERCISE|38 Videos

Similar Questions

Explore conceptually related problems

Number of tertiary bromide of formula C_(5)H_(11)Br are (X) number of tertiary bromide of formula C_(6)H_(13)Br are (Y) Report your answer as X + Y

calculate the number of protons, neutrons and electrons in ._(35)^(85)Br

If [(3,5),(7,9)] is written as A + B, where A is the skew-symmetric matrix and B is the symmetric matrix, then write the matrix A.

[Co(en)_(2)NO_(2)Br]Cl can exhibit

Name the type of reaction by which X [compound of C & Br] can be prepared from ethane.

The total number of electrons present in 4^"th" shell of Bromine ( ._35Br ) are:

Draw the Lewis symbols of the following elements. Na, Ca, Br, Xe, As, Ge

Write Lewis dot symbols for atoms of the following elements: Mg, Na, B, O, N, Br.

20 " mL of " (M)/(60) KBrO_3 was reacted with a sample of SeO_(3)^(2-) 20 The Br_(2) thus evolved was removed and the excess of NaAsO_(2) The reaction involved are SeO_(3)^(2-)+BrO_(3)^(ɵ)+H^(o+)toSeO_(4)^(2-)+Br_(2)+H_(2)O .. (i) BrO_(3)^(ɵ)+ASO_(2)^(ɵ)+H_(2)OtoBr^(ɵ)+AsO_(4)^(3-)+H^(o+) ..(ii) [Mw(SeO_(3)^(2-))=79+48=127gmol^(-1)] Q. m" Eq of " SeO_(3)^(2-) is

NCERT ENGLISH-STRUCTURE OF ATOM -EXERCISE
  1. In Milikan's experiment, static electrons charge on the oil drops has ...

    Text Solution

    |

  2. In Rutherford's experiment, generally the thin foil of heavy atoms, su...

    Text Solution

    |

  3. Symbols .(35)^(79) Br and ^(79)Br can be written whereas symbols (79...

    Text Solution

    |

  4. An element with mass number 81 contains 31.7% more neutrons as compare...

    Text Solution

    |

  5. An ion with mass number 37 possesses one unit of negative charge. If t...

    Text Solution

    |

  6. An ion with mass number 56 contains 3 units of positive charge and 30....

    Text Solution

    |

  7. Arrange the following type of radiations in increasing order of freque...

    Text Solution

    |

  8. Nitrogen laser produces a radiation at a wavelength of 33.71 nm. If th...

    Text Solution

    |

  9. Neon gas is generally used in the sign boards. If it emits strongly at...

    Text Solution

    |

  10. In astronomical observations, signals observed from the distant stars ...

    Text Solution

    |

  11. Lifetimes of the molecules in the excited states are often measured by...

    Text Solution

    |

  12. The longest wavelength doublet absorption is observed at 589 and 589.6...

    Text Solution

    |

  13. The work function for caesium atom is 1.9 eV. Calculate (a) the thresh...

    Text Solution

    |

  14. Following results are observed when sodium metal is irradiated with di...

    Text Solution

    |

  15. The ejection of the photoelectron from the silver metal in the photoel...

    Text Solution

    |

  16. If the photon of the wavelength 150 p m strikes an atom and one of its...

    Text Solution

    |

  17. Emission transitions in the Paschen series end at orbit n=3 and start ...

    Text Solution

    |

  18. Calculate the wavelength for the emission transition if it starts from...

    Text Solution

    |

  19. Dual behaviour of matter proposed by de Broglie led to the discovery o...

    Text Solution

    |

  20. Similar to electron diffraction, neutron diffraction microscope is als...

    Text Solution

    |