Atoms with three of their outer most orbits incompletely filled with electrons are present in:

Lanthanides

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Representative elements

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s - block elements

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transitional elements

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Solution

The correct option is A Lanthanides
In lanthanides n, (n-1) and (n-2) shells are half filled or incompletely filled

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Similar questions

The first two orbits of an atom are completely filled with electrons and no electron is there in the third shell. The atomic number of the element is ________.

Name:

1. Three elements having a single electron in their outermost shell.

2. Three elements with filled outermost shell.

3. Three elements having 7 electrons in their outermost shell.

Q.
In metals, the conduction bands are incompletely filled orbitals that allow electrons to flow.

The statement that is not correct for periodic classification of elements is
(a) The properties of elements are the periodic function of their atomic numbers
(b) Non-metallic elements are less in numbers than metallic elements
(c) For transition elements, the 3d orbitals are filled with electrons after 3 p - orbitals and before 4s orbitals
(d) the first ionization enthalpies of elements generally increase with the increase in atomic number as we go along a period

Q. Assertion:
The difference in the successive oxidation states exhibited by tranisition elements is unit only.
Reason:
d orbitals of transition elements are incompletely filled.

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Atoms with three of their outer most orbits incompletely filled with electrons are present in:

The correct option is A LanthanidesIn lanthanides n, (n-1) and (n-2) shells are half filled or incompletely filled

The correct option is A Lanthanides
In lanthanides n, (n-1) and (n-2) shells are half filled or incompletely filled