A student examines idealized, equal-volume microscopic regions of two iron alloys. The atomic radii and relative atomic masses used in the models are shown in the table.

Atom	Atomic radius (pm)	Relative atomic mass
\(\text{Fe}\)	126	55.8
\(\text{C}\)	70	12.0
\(\text{Ni}\)	124	58.7

Each particle shown represents one atom, and each rectangular region has the same volume and depth. Based on the representations and the data, which statement correctly identifies the two alloy types and compares their densities and expected malleabilities?