Question

re - order the list in the table below, if necessary, so that the atoms and ions in it are listed in order of decreasing size. atoms and ions atoms and ions in order of decreasing size f, cl, cl

Explanation:

Step1: Compare atomic radii of F and Cl

Atomic radius increases down a group. Cl is below F in Group 17, so \(Cl>F\).

Step2: Compare size of \(Cl\) and \(Cl^-\)

An anion (\(Cl^-\)) is larger than its parent atom (\(Cl\)) because of increased electron - electron repulsion. So \(Cl^->Cl\).

Answer:

\(Cl^-\), \(Cl\), \(F\)