CAIE A-Level Chemistry AS 1.1.7 Trends the Variations in Atomic Radius Questions

Practise explaining atomic and ionic radius trends using nuclear charge, electron shells and shielding across the periodic table.

Exam points

Explain periodic trends in atomic and ionic radius using nuclear charge, electron shells and shielding.

[Maximum number: 1]

This question refers to isolated gaseous species.
The species $\mathrm{F}^{-}, \mathrm{Ne}$ and $\mathrm{Na}^{+}$ are isoelectronic. This means they have the same number of electrons.

In which order do their radii increase?

smallest

$\longrightarrow$

largest

$\mathrm{Na}^{+}$

$\mathrm{F}^{-}$

$\mathrm{Na}^{+}$

$\mathrm{F}^{-}$

$\mathrm{Na}^{+}$

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CAIE A-Level Chemistry AS 1.1.7 Trends the Variations in Atomic Radius Questions question 1