Question
Asked Jan 18, 2020
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A silicon atom is more massive than a sodium atom. Why then is a sodium atom larger in size?

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Expert Answer

Step 1

Step 1

Across the periodic table, there is a simple trend that from left to right the size of an atom decreases as the nuclear charge on it increases.

Step 2

Step 2

Sodium belongs to the first group while Silicon belongs to the 14th group hence this directly implies that sodium has bigger size than silicon.

Also, sodium has 1 electron in outermost shell whereas silicon has 4 electrons in outmost shell. Due to large n...

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Physics of Atoms

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