FINISHED_Final_Notebook_Jones

Atomic Size
Define Atomic Size: The size of an atom is determined by the number of energy levels it has, and the mass
of the nucleus.
Increase in
Atomic Size
Increase in Atomic Size
Cation Size Increases
Anion Size Increases
Explanation:
The size of an atom increases as you move higher (top to bottom) in groups, the atomic size increases because there
are energy levels added in each group (Group 1 - 1 energy level | Group 2 - 2 energy levels, etc.). However, when going
laterally along the periodic table (intra-periodic), the atomic size decreases because as there is greater atomic mass
(a larger number of protons) the gravitational pull between the protons and electrons increases, thus increasing the pull
by the protons on the electrons, which causes the electrons to be pulled closer in proximity to the nucleus. This
consequently results in a decrease in size as the electrons are pulled closer and closer to the nucleus.
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