what type of alloy is shown in the particle model?\nsubstitutional alloy\ninterstitial alloy

Brief Explanations:

In this particle model, the larger yellow atoms (host metal atoms) have some of their positions replaced by similarly sized blue atoms (alloying metal atoms). This matches the structure of a substitutional alloy, where atoms of comparable size substitute for host atoms in the crystal lattice. Interstitial alloys involve much smaller atoms fitting into the gaps between larger host atoms, which is not depicted here.

Answer:

substitutional alloy