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Compare the atomic radius values with the electron shell drawings.

What is the relationship between atomic radius and electron shell size?

Answer :

Final Answer:

The relationship between atomic radius and electron shell size is that as you move down a group in the periodic table, the atomic radius increases, and as you move across a period, the atomic radius decreases.

Explanation:

The atomic radius is defined as the distance between the nucleus of an atom and its outermost electron shell. As you move down a group in the periodic table, each succeeding element has an additional electron shell.

The increase in electron shells causes the atomic radius to expand because the outer electrons are now farther from the nucleus. Conversely, when moving across a period from left to right, electrons are added to the same shell, increasing the positive charge in the nucleus. This stronger attraction pulls the electrons closer to the nucleus, reducing the atomic radius.

In summary, the trend in atomic radius is primarily influenced by the number of electron shells and the effective nuclear charge. A greater number of electron shells leads to a larger atomic radius, while an increased effective nuclear charge results in a smaller atomic radius.

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