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Based on their location in the figure below, oxygen and selenium have
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similar properties.
the same number of electron orbitals.
the same number of neutrons
the same conductivity.
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Similar properties.
They are in the same group (column) of the periodic table, so they have the same number of valence electrons and therefore similar chemical behavior. They do not have the same number of electron orbitals (different periods), not the same number of neutrons (different elements/isotopes), and they differ in conductivity (O₂ is a nonmetal gas, Se is a semiconducting solid).
They are in the same group (column) of the periodic table, so they have the same number of valence electrons and therefore similar chemical behavior. They do not have the same number of electron orbitals (different periods), not the same number of neutrons (different elements/isotopes), and they differ in conductivity (O₂ is a nonmetal gas, Se is a semiconducting solid).
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