What is a semiconductor

The movement of tectonic plates and in two locations is described below: location a: tectonic played push together location b: tectonic plates push apart

Which of the following would have the lowest average kinetic energy

\at normal temperatures and pressures a certain metal element forms a crystal with a bcc unit cell and lattice constant . the density of is measured to be . using only this information, identify the element and write its chemical symbol below.