Home
Class 10
CHEMISTRY
Four elements A, B, C and D have atomic ...

Four elements A, B, C and D have atomic numbers 12, 13, 14 and 15 respectively.
Answer the following questions giving reasons :
(i) What is the number of valence electrons and valency of D?
(ii) Which of them will have largest atomic radii ?
(iii) Which of these elements will form the most basic oxide ?

Text Solution

Verified by Experts

(i) Valence electrons in .D. = 5 and Valency of .D. = 3.
(ii) .A. will have largest atomic radii because atomic radius decreases across a period from left to right.
(iii) .A. will form the most basic oxide as it is most metallic.
Promotional Banner

Topper's Solved these Questions

  • PERIODIC CLASSIFICATION OF ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC:2- LONG ANSWER TYPE QUESTIONS|5 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS

    OSWAAL PUBLICATION|Exercise NCERT CORNER -INTEXT QUESTIONS|13 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC:2-SHORT ANSWER TYPE QUESTIONS-I|25 Videos

  • METALS AND NON-METALS

    OSWAAL PUBLICATION|Exercise NCERT CORNER (Textbook Exercises)|16 Videos

  • SOLVED PAPER SSLC KARNATAKA APRIL 2019

    OSWAAL PUBLICATION|Exercise QUESTIONS|49 Videos

Similar Questions

Explore conceptually related problems

Elements A, B, C, and D have atomic numbers 1, 8, 11, and 19 respectively. Choose the odd element and give reason for your answer.

The elements _(4)Be,_(12)Mgand_(20)Ca each having two, valence electrons in their valence shells are in periods 2, 3 and 4 respectively of the modern periodic table. Answer the following questions associated with these elements, giving reason in each case, (i) In which group should they be? (ii) Which one of them is least reactive ? (iii) Which one of them has the largest atomic size ?

Four elements A, B, C and D along with their electronic configuration are given below: Now answer the following questions: (i) Which two elements belong to the same period ? (ii) Which two elements belong to the same group ? (iii) Which element out of A and C is more reactive and why?

Three elements X, Y and Z have atomic numbers 7, 10 and 14 respectively. (i) Identify the group number of these elements in the periodic table. (ii) Mention one unique feature each of elements Y and Z. (iii) Which of the above two elements belong to the same period ?

Two elements X and Y have atomic numbers 12 and 16 respectively. To which period of the modern periodic table do these two elements belong ? What type of bond will be formed between them and why?

Three elements 'X', 'Y' and 'Z' have atomic numbers 7, 8 and 9 respectively. (i) State their positions (Group number and period number both) in the Modern Periodic Table. (ii) Arrange these elements in the decreasing order of their atomic radii. (iii) Write the formula of the compound formed when 'X' combines with 'Z'.

Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but different in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of elements D is almost neutral. Answer the following questions based on the information given here in : (i) To which group or period of the periodic table do the listed elements belong ? (ii) Which one of the eight elements is likely to be a noble gas? (iii) Which one of the eight elements would have the largest atomic radius ? (iv) Which two elements amongst these are likely to be the non-metals? (v) Which one of these eight elements is likely to be a semi-metal or metalloid ?

Two elements 'P' and 'Q' belong to the same period of the modern periodic table and are in Group -1 and Group -2 respectively. Compare their following characteristics in tabular form: (i) The number of electrons in their atoms (ii) The sizes of their atoms (iii) Their metallic characters (iv) Their tendencies to lose electrons (v) The formula of their oxides (vi) The formula of their chlorides

The elements Be, Mg, and 20Ca each having two valence electrons in their valence shells are in periods 2, 3, and 4 respectively of the Modern Periodic Table. Answer the following questions associated with these elements, giving reason in each case. a] In which group should they be? b] Which one of these is least reactive? c] Which one of them has the largest atomic size?

OSWAAL PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-TOPIC:2- SHORT ANSWER TYPE QUESTIONS-II
  1. Three elements 'X', 'Y' and 'Z' have atomic numbers 7, 8 and 9 respect...

    Text Solution

    |

  2. The position of eight elements in the modern periodic table is given b...

    Text Solution

    |

  3. Four elements A, B, C and D have atomic numbers 12, 13, 14 and 15 resp...

    Text Solution

    |

  4. From the following elements : (4)Be,(9)F,(19)K,(20)Ca (i) Select t...

    Text Solution

    |

  5. Na, Mg and Al are the elements of the same period of modern periodic t...

    Text Solution

    |

  6. The elements (4)Be,(12)Mgand(20)Ca each having two, valence electrons ...

    Text Solution

    |

  7. Two elements 'P' and 'Q' belong to the same period of the modern perio...

    Text Solution

    |

  8. The atomic number of an element 'X' is 20. (i) Determine the positio...

    Text Solution

    |

  9. Four elements P, Q, R and S belong to the third period of the Modern P...

    Text Solution

    |

  10. In the following table, the positions of six elements A, B, C, D, E an...

    Text Solution

    |

  11. The electrons in the atoms of four elements A, B, C and D are distribu...

    Text Solution

    |

  12. Based on the group valency of elements state the formula for the follo...

    Text Solution

    |

  13. Consider two elements ‘A’ (Atomic number 17) and 'B' (Atomic number 19...

    Text Solution

    |

  14. Study the following table in which positions of six elements A, B, C, ...

    Text Solution

    |

  15. The elements Li, Na and K, each having one valence electron, are in pe...

    Text Solution

    |

  16. An atom has electronic configuration 2, 8, 2. (i) What is the atomic...

    Text Solution

    |

  17. Two elements X and Y belong to group 1 and 2 respectively in the same ...

    Text Solution

    |

  18. Four elements A, B, C and D along with their electronic configuration ...

    Text Solution

    |

  19. Four elements A, B, C and D have atomic numbers 12, 13, 14 and 15 resp...

    Text Solution

    |

  20. Three elements X, Y and Z have atomic numbers 7, 10 and 14 respectivel...

    Text Solution

    |