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PASSAGE - 1: In Mendeleeff's periodic ta...

PASSAGE - 1: In Mendeleeff's periodic table elements were classified on the basis of atomic weight & in modern periodic table on the atomic number. The lighter elements of 2 & 3 periods show similarities in their properties called diagonal relationship
1. Which of the following element is not present in Mendeleeff's periodic table

A

Carbon

B

Chlorine

C

Argon

D

Potassium

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • PASSAGE - 1: In Mendeleeff's periodic table elements were classified on the basis of atomic weight & in modern periodic table on the atomic number. The lighter elements of 2 & 3 periods show similarities in their properties called diagonal relationship The atomic number of element separated from main body of periodic table is

    A
    64
    B
    20
    C
    46
    D
    57

  • PASSAGE - 1: In Mendeleeff's periodic table elements were classified on the basis of atomic weight & in modern periodic table on the atomic number. The lighter elements of 2 & 3 periods show similarities in their properties called diagonal relationship Due to digonal relation which pair are amphoteric in nature

    A
    `Li_2,O,MgO`
    B
    `BeO,MgO`
    C
    `B_2,O_3Al_2O_3`
    D
    `BeO,Al_2O_3`

  • Diagonal relationship is present between the lighter elements of periods

    A
    Second, third
    B
    Second, fourth
    C
    Third, fourth
    D
    Third , fifth

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