Question
Arrange the following species in order of increasing radius.(a) $\mathrm{Rb}, \mathrm{K}, \mathrm{Cs}, \mathrm{Kr}$(b) $\mathrm{Ar}, \mathrm{Cs}, \mathrm{Si}, \mathrm{Al}$
Step 1
As we move down a group (vertical column) in the periodic table, the atomic radius increases. This is because each row adds a new electron shell. However, as we move across a period (horizontal row) from left to right, the atomic radius generally decreases. This Show more…
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List the following species in order of increasing radius. (a) $\mathrm{Rb}, \mathrm{K}, \mathrm{Cs}, \mathrm{Kr}$ (b) $\mathrm{Ar}, \mathrm{Cs}, \mathrm{Si}, \mathrm{Al}$
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List the following species in order of decreasing radius. (a) $\mathrm{C}, \mathrm{Mg}, \mathrm{Ca}, \mathrm{Si}$ (b) $\mathrm{Sr}, \mathrm{Cl}, \mathrm{Br}, \mathrm{I}$
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