Home
Class 10
CHEMISTRY
(a) Explain why: (i) All the elements ...

(a) Explain why:
(i) All the elements of a group have similar chemical properties.
(ii) All the elements of a period have different chemical properties.
(b) The atomic radii of three elements `X,Y` and `Z` of a period of the periodic table are 186 pm, 104 pm and 143 pm respectively. Giving reason arrange these elements in the increasing order of atomic numbers in the period.

Text Solution

Verified by Experts

The correct Answer is:
(b) Orde of atomic numbers of elements: `XltZltY`. Because as the atomic number increases in a period from left to right the size of atoms goes on decreasing.
NA
Promotional Banner

Topper's Solved these Questions

  • PERIODIC CLASSIFICATION OF ELEMENTS

    LAKHMIR SINGH & MANJIT KAUR|Exercise SHORT ANSWER TYPE|8 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS

    LAKHMIR SINGH & MANJIT KAUR|Exercise LONG ANSWER TYPE|3 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS

    LAKHMIR SINGH & MANJIT KAUR|Exercise VERY SHORT ANSWER TYPE|6 Videos

  • METALS AND NON-METALS

    LAKHMIR SINGH & MANJIT KAUR|Exercise Short Answer Type Qustions|1 Videos

  • TEST PAPER 1

    LAKHMIR SINGH & MANJIT KAUR|Exercise Section B|4 Videos

Similar Questions

Explore conceptually related problems

The elements in a period have consecutive atomic numbers.

Why do elements in the same period have different physical and chemical properties? What about elements in the same group?

The elements x,y and z are present in one period of the periodic table. Chemically their oxides are acidic, amphoteric and basic respectively. When these elements are arranged in ascending order of atomic number they are

All the elements in a group in the periodic table have the same

LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. Mendeleve predicted the exitence of certain elements not known at that...

    Text Solution

    |

  2. A part of the early classification of elements has been given below: ...

    Text Solution

    |

  3. (a) Explain why: (i) All the elements of a group have similar chemic...

    Text Solution

    |

  4. (a) How does the electropositive character of elements change on going...

    Text Solution

    |

  5. (a) What is the fundamental difference in the electronic configuration...

    Text Solution

    |

  6. (a) What is the usual number of valence electrons and valency of group...

    Text Solution

    |

  7. (a) What is the main characteristic of the last elements in the perio...

    Text Solution

    |

  8. (a) How does the atomic size vary on going down form top to bottom in ...

    Text Solution

    |

  9. (a) How does the tendency to lose electrons change as we go down in gr...

    Text Solution

    |

  10. (a) Why does the side of the atoms progressively become smaller when w...

    Text Solution

    |

  11. (a) In the modern Periodic Table, why does cobalt with higher atomic m...

    Text Solution

    |

  12. (a) Explain why the first period of the modern periodic table has only...

    Text Solution

    |

  13. (a) What is a group in the periodic table in which part of a group wou...

    Text Solution

    |

  14. Which of the following statements is not a correct statement about the...

    Text Solution

    |

  15. The electronic configuration of the atom of an element X is 2,8,4. In ...

    Text Solution

    |

  16. The atomic number of an element is 20. In modern periodic table, this ...

    Text Solution

    |

  17. Five elements A, B, C, D and E have atomic numbers of 2, 3, 7, 10 and ...

    Text Solution

    |

  18. The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 ...

    Text Solution

    |

  19. Which of the following elements would lose an electron easily ?

    Text Solution

    |

  20. Which of the following elements does not lose an electron easily ?

    Text Solution

    |