Which statement best describes an atom's structure? A. negatively-charged particles surrounded by a positively-charged cloud B. positively-charged particles surrounding a neutrally-charged center C. negatively-charged particles surrounding a positively-charged center D. positively-charged particles surrounded by a neutrally-charged cloud

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Light waves can move through , but they travel fastest when they move through a(n) .

The diagrams to the right show the distribution and arrangement of gas particles in two different containers. according to kinetic-molecular theory, which of the following statements is true? check all that apply. if the temperatures of both containers are equal, container a has greater pressure than container b. if the volume of container a decreased, its pressure would decrease. if the pressure in both containers is equal, container a has a lower temperature than container b.