A stainless-type alloy contains 90 % Fe (atomic radius 124 pm), 8 % Cr (128 pm)
CHEMISTRY · Single correct · AP · Chemistry · Compound Structure and Properties · Compound Structure and Properties
Problem
A stainless-type alloy contains 90 % Fe (atomic radius 124 pm), 8 % Cr (128 pm), and 2 % C (70 pm) by moles. Which statement correctly describes how the Cr and C atoms are incorporated into the iron lattice?
(a) Both chromium and carbon substitute for iron atoms at lattice sites.
(b) Chromium atoms occupy interstitial sites, while carbon substitutes for iron atoms.
(c) Chromium substitutes for iron atoms, and carbon occupies the interstitial spaces between iron atoms.
(d) Both chromium and carbon occupy interstitial sites within the iron lattice.