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Which statement best describes how electrons fill orbitals in the periodic table?
Electrons fill orbitals in order of their increasing energy from left to right.
Electrons fill orbitals in order of their increasing energy from right to left.
Elements fill orbitals in order of increasing energy from top to bottom in each group.
Elements fill orbitals in order of increasing energy from bottom to top in each group.

Respuesta :

We are asked to describe how electrons fill orbitals in the periodic table. Among these, the correct statement is that electrons fill orbitals in order of increasing energy from left to right. This is verified by Aufbau principle. We see that as we move across from left to right, as the group number increase, the number of valence electron/s of each group also increases. 
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Answer: The statement that best describes how electrons fill orbitals in the periodic table is "Electrons fill orbitals in order of their increasing energy from left to right". It's possible to see this effect once we notice that, from left to right, the number of electrons related to each atom increases, showing that the orbitals are being filled according to Aufbau procedure.

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