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- Atomic size decreases as we move from left to right in a period. Explanation: As period number increases, number of shells increase, so atomic size increases.
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Apr 25, 2012 · As you move from left to right across a period, the number of protons in the nucleus increases. The electrons are thus attracted to the nucleus more strongly, and the atomic radius is smaller (this attraction is much stronger than the relatively weak repulsion between electrons).
Aug 14, 2020 · Trends in atomic size result from differences in the effective nuclear charges (\(Z_{eff}\)) experienced by electrons in the outermost orbitals of the elements. For all elements except H, the effective nuclear charge is always less than the actual nuclear charge because of shielding effects.
Oct 20, 2015 · Atomic radius decreases across a period because valence electrons are being added to the same energy level at the same time the nucleus is increasing in protons. The increase in nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus.
Jun 30, 2023 · Atomic size gradually decreases from left to right across a period of elements. This is because, within a period or family of elements, all electrons are added to the same shell. However, at the same time, protons are being added to the nucleus, making it more positively charged.
Sep 20, 2022 · How does the atomic radius of different elements change across a period? How does atomic radius change from top to bottom within a group? Explain why the atomic radius of hydrogen is so much smaller than the atomic radius of potassium.
Mar 15, 2018 · Key Questions. How does atomic size increase on periodic table? Answer: Atomic size increases with increase in period number. (as we move from above to below in a group ) Atomic size decreases as we move from left to right in a period . Explanation: As period number increases , number of shells increase , so atomic size increases .
Atomic Radius Trend 1: Atomic Radii Decrease From Left to Right Across a Period. The first atomic radius periodic trend is that atomic size decreases as you move left to right across a period. Within a period of elements, each new electron is added to the same shell.
