The third row, or period, has 6 electrons.
The concept of "orbits" for the third (or any) row does not make sense. Please restate the question, giving more details, if I did not answer it to your satisfaction.
A paddle is used to row a boat.
The periodic table contains seven rows of elements. The lanthanide series belongs to row six as elements 57-71. The actinide series belongs to row seven as elements 89-103.
Elements having electrons in their third valence shell can be found in the third row of the periodic table (elements 11-18).
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Electrons in Bohr's model of the atom