MathDB

48

Part of 2013 National Chemistry Olympiad

Problems(1)

2013 USNCO Problem 48: Metalloids

Source:

4/20/2013
In which set are both elements metalloids?
<spanclass=′latex−bold′>(A)</span> Cr and Mo<spanclass=′latex−bold′>(B)</span> Ge and As<spanclass=′latex−bold′>(C)</span> Sn and Pb<spanclass=′latex−bold′>(D)</span> Se and Br{ <span class='latex-bold'>(A)</span>\ \text{Cr and Mo}\qquad<span class='latex-bold'>(B)</span>\ \text{Ge and As}\qquad<span class='latex-bold'>(C)</span>\ \text{Sn and Pb}\qquad<span class='latex-bold'>(D)</span>}\ \text{Se and Br}\qquad