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why is the atomic radius of calcium(0.197nm) larger than that of iron(0.116nm)?

D

DarkEclipse

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Iron [Ar] 3d6 4s2
Calcium [Ar] 4s2

Iron has an extra d subshell, whereas Calcium does not. Therefore, Iron's nucleus attracts the electrons towards itself, which results in the outer shell being closer to the nucleus. Therefore, Calcium has a higher atomic radius than Iron.
 
22shimmer22girly

22shimmer22girly

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DarkEclipse said:
Iron [Ar] 3d6 4s2
Calcium [Ar] 4s2

Iron has an extra d subshell, whereas Calcium does not. Therefore, Iron's nucleus attracts the electrons towards itself, which results in the outer shell being closer to the nucleus. Therefore, Calcium has a higher atomic radius than Iron.
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thank uuu sooo muchhh
 
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