Part A
Arrange the elements in order of increasing first ionization
energy: Si, F, Sn, O.
Rank elements from smallest to largest. To rank items as
equivalent, overlap them.
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Si
F
Sn
O
Smallest
Largest
The correct ranking cannot be determined.
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Part B
Arrange the isoelectronic series in order of decreasing radius:
Cl−, K+, S2−, Ca2+.
Rank ions from largest to smallest. To rank items as equivalent,
overlap them.
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K+
Ca2+
S2−
Cl−...