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The elements in which electrons are prog...

The elements in which electrons are progressively filled in 4f orbital are called

A

actinoids

B

transition elements

C

lanthanoids

D

halogens.

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • The elements in which electron enters to 3d orbitals

    A
    21 to 29
    B
    21 to 32
    C
    21 to 90
    D
    21 to 31

  • The two electrons present in an orbital are distinguished by

    A
    Principal quantum number
    B
    Azimuthal quantum number
    C
    Magnetic quantum number
    D
    spin quantum number.

  • The highest oxidation state is shown by the element with the electronic configuration in d -orbitals

    A
    A) `d^5`
    B
    B) `d^3`
    C
    C) `d^9`
    D
    D) `d^2`

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    Which elements has two shells, both of which are completely filled with electrons?

    The valency of representative elements is given by the number of electrons in the outermost orbital and/or equal to …………. Minus the number of outermost electrons.

    From the following elements : _(4)Be,_(9)F,_(19)K,_(20)Ca (i) Select the element having one electron in the outermost shell. (ii) Two elements of the same group. Write the formula and mention the nature of the compound formed by the union of _(19)K and element X (2,8,7).

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