Single Choice

The atomic number at which filling of a g-orbital is likely to begin is:

A$$121$$
Correct Answer
B$$116$$
C$$106$$
D$$124$$

Solution

The above question can be answered on the basis of reasoning from analogy. We note that two periods have to pass before d-orbitals begin to fill. This is also true of the spot where f-orbitals commence filling. The second row where f-orbitals fill happens to be row #7 (the one starting with Fr). The first element where 5f-orbitals enter in is actinium (Ac, Z = 89). Adding 32 to this would give element #121 termed as Unbiunium, the first Super-Actinide.

SIMILAR QUESTIONS

Atomic Structure

Which one of the following sequences with regard to the energy content of different orbitals, is correct?

Atomic Structure

What happens when both of the orbitals in a molecule are in phase, either both positive or both negative and the electrons in the bonds are at their lowest energy level?

Atomic Structure

Not considering the electronic spin, the degeneracy of the second excited state $$\left(n=3\right)$$ of $$H$$-atom is $$9$$, while the degeneracy of the second excited state of $${H}^{-}$$ is _______.

Atomic Structure

The electronic configuration, $$1s^22s^22p^63s^23p^63d^9$$, represents a:

Atomic Structure

The $$71^{st}$$ electron of an element $$X$$ with an atomic number of $$71$$ enters into the orbital:

Atomic Structure

If the principle quantum number n = 6, the correct sequence of filling of electron will be :

Atomic Structure

Which of the following electronic configurations has maximum energy ?

Atomic Structure

Using the Hund rules, write the spectral symbol of the basic term of the atom whose only partially filled subshell (a) is filled by $$1/3$$, and $$ S = 1$$; (b) is filled by $$70\%$$, and $$S = 3/2$$.

Atomic Structure

Match the atomic numbers among, $$4,8,10,15$$ and $$19$$ with An element with $$4$$ shells.

Atomic Structure

Match the atomic numbers, $$4,8,10,15$$ and $$19$$ with: Element which does not form ion.

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