What is the isotope with 50 protons, 68 neutrons, and 50 electrons?

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.

How many moles of al3+ ions are in 1.25 moles of al2o3

  the mississippians were considered to be  horticulturalists, which means they were