Question 1
White tin is the high temperature form of the metal. Given that the density of gray tin is 5.769 g/cm
3 and that of white tin is 7.28 g/cm
3 raising the pressure will favor the
◦ less dense allotrope and lower the transition temperature of 13.2°C.
◦ more dense allotrope and lower the transition temperature of 13.2°C.
◦ more dense allotrope and raise the transition temperature of 13.2°C.
◦ less dense allotrope and raise the transition temperature of 13.2°C.
Question 2
What element was one of the "holes" in Mendeleev's periodic table?
◦ Pb
◦ Ge
◦ Si
◦ Sn