Fill in the blank. a change occured when a metal changed color because it reacted with another substance.

Particles vibrate in a rigid structure and do not move relative to their neighbors.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?