Home
Class 10
CHEMISTRY
Mendeleev predicted the existence of cer...

Mendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-Silicon and Eka-aluminium
(a) Name the elements which have taken the place of these elements
(b) Mention the group and the period of these electron in the modern periodic table
(c) Classify these elements as metals, non-metals or metalloids
(d) How many valence electrons are present in each one of them ?

Text Solution

Verified by Experts

(a) Germanium (Ge) and Gallium (Ga)
(b) Group 14, Period 4 and Group 13, Period 4
(c) Ge - Metalloid, Ga - Metal
(d) Ga - 3, Ge - 4
Promotional Banner

Topper's Solved these Questions

  • PERIODIC CLASSIFICATION OF ELEMENTS

    VK GLOBAL PUBLICATION|Exercise HIGHER ORDER THINKING SKILLS|10 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS

    VK GLOBAL PUBLICATION|Exercise PROFICIENCY EXERCISE (VERY SHORT ANSWER QUESTIONS)|5 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS

    VK GLOBAL PUBLICATION|Exercise SHORT ANSWER QUESTIONS-II|24 Videos

  • MODEL QUESTIONS PAPER - 5

    VK GLOBAL PUBLICATION|Exercise SECTION B|3 Videos

  • PRACTICAL BASED QUESTIONS

    VK GLOBAL PUBLICATION|Exercise Experiment 15|4 Videos

Similar Questions

Explore conceptually related problems

Mendeleev's predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Name the elements which have taken the place of these elements.

Mendeleev's predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. How many valence electrons are present in each one of them?

Mendeleev's predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Classify these elements as metals, non-metals or metalloids.

Mendeleev's predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Mention the group and the period of these elements in the Modem Periodic Table.

Mendeleve predicted the exitence of certain elements not known at that time and named to of them as eka-aluminium and eka-silicon. (a) Name the element which has taken the place of (i) eka-aluminium, and (ii) eka-silicon (b) Mention the period/periods of these elements in the modern periodic table. (c) Write the group/groups of these elements in the modern periodic table. (d) Classify these elements as metals, non metals or metalloids. (e) How many valence electrons are present in the atoms of each these elements?

Name two elements of first period in modern periodic table.

Write the formulae of chlorides of Eka-Silicon and Eka-aluminium, the elements predicted by Mendeleev.

In modern periodic table, by which name d-block elements are known ?

VK GLOBAL PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -LONG ANSWER QUESTIONS
  1. How do you calculate the valency of an element from its electronic con...

    Text Solution

    |

  2. What is the valency of magnesium with atomic number 12 and sulphur wit...

    Text Solution

    |

  3. How does the valency vary in a period on going from left to right?

    Text Solution

    |

  4. How does the valency vary in going down a group?

    Text Solution

    |

  5. An element is placed in 2^("nd") group and 3^("rd") period of the peri...

    Text Solution

    |

  6. Atomic number of few elements are given below 10, 20, 7, 14 (a) Iden...

    Text Solution

    |

  7. Mendeleev predicted the existence of certain elements not known at tha...

    Text Solution

    |

  8. An element X which is a yellow solid at room temperature shows catenat...

    Text Solution

    |

  9. An element X of group 15 exists as diatomic molecule and combines with...

    Text Solution

    |

  10. Give an account of the process adopted by Mendeleev for the classifica...

    Text Solution

    |

  11. The atomic number of an element ‘X' is 19. (a) Write its electron...

    Text Solution

    |

  12. (a) How does the atomic radius change as you go (i) from left to righ...

    Text Solution

    |

  13. (a) How would the tendency to lose electrons change as you go (i) fro...

    Text Solution

    |

  14. The position of eight elements in the Modern Periodic Table is given b...

    Text Solution

    |

  15. Atoms of eight elements A, B, C, D, E, F, G and H have the same number...

    Text Solution

    |

  16. Atoms of seven elements A, B, C, D, E, F and G have a different number...

    Text Solution

    |

  17. In the following table, six elements A, B, C, D, E and F of the modern...

    Text Solution

    |