4) Which substance in each set has the highest melting point? Justify your answer
using chemical principles.
a. KCl or SiO2
b. NH3 or C diamond

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible?

Identify which properties could correspond to solids, plasmas, or both. maintain a unique shape. collide infrequently with other particles. have very high velocities. conduct electricity. protons. have a low temperature. has long-range order.

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc