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As you move from left to right across a Period in the Periodic Table, which trend of elementary properties does NOT occur?

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Correct Answer: B. Atomic radius increases
As you move from left to right across a Period, metallic properties decrease (metals > metalloids > non-metals), atomic radius decreases (the atoms get smaller), electronegativity (the ability to attract electrons in a compound) increases, first ionization energy (the energy required to remove the outermost electron form a neutral atom) increases and electron affinity (the energy released when an electron is bonded to an atom) increases.
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