Based on the Radioactive Decay chart in the reading, which of the following elements would emit destructive radioactive material?
a. Plutonium b. Carbon
c. Hafnium d. Thorium

Freezing 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.

Which statement best describes the he properties of iconic compounds ?

Calculate the concentration of all species in a 0.165 m solution of h2co3.