What are atoms? 1.electronic devices
2.batteries
3.light bulbs
4.particles of matter

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

How does concentration affect reaction rate

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.