Periodicity and Inorganic Chemistry of the Main Groups and Selected Chemistry
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A-Level Chemistry Q & A Practice
1 of 5 free exam-style exercises in this topic
Which trend and explanation for Group 2 carbonates is correct?
down group
cation radius
polarising power
thermal stability
trend
increases
decreases
increases
ionic radius increases down group
polarising power decreases → carbonate stability increases
Select one option.
A
stability decreases because charge increases
B
stability is constant
C
stability decreases because carbonate becomes more covalent
D
stability increases because lattice enthalpy always increases
E
stability increases because larger cations polarise CO₃²⁻ less
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