What are the atomic numbers of elements whose outermost electrons are represented by
`3d^6`?

What is the atomic number of elements whose outermost electrons are represented by 3s ^(1)

What is the atomic number of elements whose outermost electrons are represented by 2p ^(3)

What is the atomic number of elements whose outermost electrons are represented by 3p ^(5)

What is the maximum number of electrons in the outermost shell of an atom ?

Write the nameand atomic number of fourth element of the3d-series.

The atomic number of an element is 13. What will be the number of electrons in its ion X3+

Write the name and atomic number of the last element of 3d-series.

Writethe nameand atomic number of ninth element of the3d-series.

Write the distribution of electrons in an atom of element whose atomic number is 18. What is special about the outermost electron shell (or valence shell) of the atom of this element ?

What is the maximum number of emission lines when the excited electron of H atom in n = 6 drops to the ground state ?