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Arrange these elements according to atomic radius.
Largest radius
Smallest radius
Answer Bank
Te Po Se O S
Rank the elements by effective nuclear charge, Zeff, for a valence electron.
Highest Zeff
Lowest Zeff
Answer Bank
Bi Pb Rn Ba Po
♦ Relevant knowledge
Net positive charges that is experienced by electrons in electrons in poly-electronic atoms is known as the nuclear charge that is effective. It is also known as the charge that is called a core. It grows over the course of time and decreases as you move down the the periodic table. When there’s an electron with more than one shell in an atom, the electrons that are located between the nucleus as well as the other electrons that are of interest are shielded because they can eliminate some of the charges electrons outside feel in the nucleus. For instance the valence electrons in Antimony (Sb) are likely to possess a less effective shielding effect than the electrons in the valence region that are found in Bismuth (Bi).
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