Blocks in the periodic table
maximum number of electrons
depends on the
number of orbitals
in the subshell.
is a region in space where an electron is likely to be found. Each orbital can contain two electrons.
The shapes of the orbitals are shown below.
Note that the number of columns in the blocks of the periodic table correspond to the maximum number of electrons in the subshells.
Dr Sheila Woodgate
© The University of Auckland 2002