The atomic radius of magnesium is 160 pm

CHEMISTRY · Single correct · GCSE · Chemistry · Bonding, Structure and the Properties of Matter · Bonding, Structure and the Properties of Matter

Problem

The atomic radius of magnesium is 160 pm, whereas aluminum has an atomic radius of 143 pm. Calculate the percent difference in atomic radii (defined as ∣rlarge−rsmall∣rlarge×100%\frac{|r_{\text{large}}-r_{\text{small}}|}{r_{\text{large}}}\times100\%) and determine the alloy type most likely formed when the two metals are mixed. (a) 18 %18\,\% difference; substitutional alloy expected (b) 11 %11\,\% difference; interstitial alloy expected (c) 11 %11\,\% difference; substitutional alloy expected (d) 12 %12\,\% difference; substitutional alloy expected

Related theory

Browse the problem library