The answer is 24 shells
Electron shielding is not a factor across a period because they all have the same number of electron shells! No further (extra) shells means that they are all affected by electron shielding equally.
The elements in a group do not have the same number of shells, however, the elements in a horizontal row do have the same number of shells.
The number of shells varies. The row number of the element is the number of shells. They don't really have names, but they're referred to by how many levels they are away from the nucleus.
Livermorium has 7 electron shells.
Neptunium has seven electron shells.
The period number is equal to the number of shells. Periods are the horizontal rows on the periodic table. The number of shells increases down a group.
No, The group number tells you the number of valence electrons, in general. The number of shells is given by the period.
The value of 'n' for the valence shells is the number of shells that specific atom has
The number of electron shells depends on the noble gas. The number of shells will be equal to the period in which the noble gas is present.
Samarium has six electron shells.
Neptunium has 7 electron shells.
The number of shells define the period. The elements of the same group has same number of shells.