How many moles are in 8.90 X 10^24 atoms of Na?

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.

What are transitions between a liquid and a solid called? identify which way they are transitioning

Which of these conditions most likely produces an unstable isotope?