What is causing the change in the dry ice and the water ice? describe what is happening at the molecular level to the substances (water and carbon dioxide) as they experience a phase change.

Which description best characterizes the motion of particles in a solid?

Of the following elements, which is the least reactive? a. c b. h c. li d. he

Most ionic compouds are crystalline solids at room temperature. true falseionic compounds are electrically neutral. true falseionic compounds generally have low melting points. true falsewhen melted, ionic compounds do not conduct electricity. true falsethe electrostatic attraction between an anion and a cation is an ionic bond. true false